net: do not look up abc by default
net: do not look up abc by default

Fixes #11665.

Change-Id: I0897e8cf695434e77d14dcb1d96f21747edfe37c
Reviewed-on: https://go-review.googlesource.com/12523
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>

nakedgc/go,vsdutka/go,kakuhiroshi/go,momchil-velikov/go,baiyunping333/go,albertjin/golang-go,jonahglover/go,Endika/go,GeorgiCodes/go,CarterTsai/go,danielsoro/go,GeorgiCodes/go,shines77/go,binarycrusader/go,vanloswang/go,malvira/go,cloudrain21/go,beealone/go,andrewchambers/go,cyberroadie/go,monetate/go,undergrowthlinear/go,mikekap/go,Badredapple/go,b54898533/go,baiyunping333/go,NichoZhang/go,vanloswang/go,pgmreddy/go,4ad/go,mikekap/go,RBEGamer/go,likesea/go,andrewchambers/go,binarycrusader/go,pgmreddy/go,sosop/go,arschles/golang-go,nakedgc/go,kakuhiroshi/go,miolini/go,alash3al/go,jonathanmarvens/go,jacobsa/go,golang/go,Stan-Lin-/go,XuYunnan/go,jasonxiong/go,albertjin/golang-go,vanloswang/go,mgyenik/go,CodyGuo/go,CAFxX/go,willjunspecial/go,suncycheng/go,cnbin/go,Charlesdong/go-1,CiscoCloud/go,jacobhaven/go,cookerzhu/go,andrewchambers/go,chinanjjohn2012/go,chinanjjohn2012/go,jdhenke/go,dgnorton/go,famorted/go,slavau/go,sndnvaps/go,Young55555/go,mdp/go,odeke-em/go,ifagnosticism/go,cloudflare/go,RBEGamer/go,albertjin/golang-go,cloudrain21/go,theass/go,vsdutka/go,skotti/go,WIZARD-CXY/go,willjunspecial/go,zcwfeng/go,Pulgafree/go,yuhengye/go,alex-zhang/go,ericsnowcurrently/go,beealone/go,ImJasonH/go,zhangg/go,lihuanghai/go,gdey/go,WIZARD-CXY/go,arschles/go-1,vishsingh/go,linux-on-ibm-z/go,theif519/go,joshsammut/go,josharian/go,wangfakang/go-1,WIZARD-CXY/go,nakedgc/go,jdeng/go,polyverse-security/go,deft-code/go,danycoro/go,kim-racktop/go,zouchao2010/go,jacobsa/go,Cofyc/go,deft-code/go,cookerzhu/go,deft-code/go,willjunspecial/go,jonasi/go,skatsuta/go,shines77/go,albertjin/golang-go,constantine001/go,kim-racktop/go,honsiorovskyi/go,ichu501/go,theif519/go,monetate/go,qskycolor/go,donnel6809/go,yuhengye/go,akutz/go,momchil-velikov/go,Stan-Lin-/go,mbrukman/go,kim-racktop/go,jacobhaven/go,miolini/go,arschles/golang-go,shazow/go,xinhuang327/go,beealone/go,goodlang/good,jacobxk/go,famorted/go,gdey/go,Charlesdong/go-1,AALEKH/go,ifagnosticism/go,donnel6809/go,mbrukman/go,monetate/go,akutz/go,fjballest/golang,devpadawan/go,skatsuta/go,ObjectiveJoe/go,jdhenke/go,rentongzhang/go,donnel6809/go,beealone/go,honsiorovskyi/go,b54898533/go,fjballest/golang,parkdy/go,lihuanghai/go,odeke-em/go,linux-on-ibm-z/go,theass/go,Endika/go,Pulgafree/go,vishsingh/go,linux-on-ibm-z/go,goodlang/good,jacobsa/go,JioCloud/go,CiscoCloud/go,cloudrain21/go,springning/go,stormltf/go,XuYunnan/go,derekmarcotte/go,sinuos/go,willjunspecial/go,XuYunnan/go,fjballest/golang,skotti/go,cainiaocome/go,cloudflare/go,sosop/go,wangfakang/go-1,famorted/go,shines77/go,goodlang/good,suncycheng/go,vsdutka/go,christopher-henderson/Go,sinuos/go,springning/go,jefby/go,arschles/go-1,gohin/go,b54898533/go,NunoEdgarGub1/go,andrewchambers/go,ichu501/go,GeorgiCodes/go,jasonxiong/go,ericsnowcurrently/go,ImJasonH/go,jasonxiong/go,derekmarcotte/go,cloudflare/go,jonathanmarvens/go,NichoZhang/go,ObjectiveJoe/go,jonahglover/go,jdeng/go,suncycheng/go,CodyGuo/go,yuhengye/go,odeke-em/go,sosop/go,AALEKH/go,leeric92/go,Stan-Lin-/go,alash3al/go,Samurais/go,zhangg/go,famorted/go,cookerzhu/go,jasonxiong/go,yangzhongj/go,jmptrader/go,dpatel06/go,slavau/go,jonathanmarvens/go,arschles/go-1,arschles/golang-go,xinhuang327/go,gohin/go,CodyGuo/go,GeorgiCodes/go,Charlesdong/go-1,wangfakang/go-1,zhangg/go,arschles/go-1,nakedgc/go,ericsnowcurrently/go,Badredapple/go,akutz/go,stormltf/go,g522342435/go,kim-racktop/go,mikekap/go,dpatel06/go,codestation/go,slavau/go,lihuanghai/go,myPublicGit/go,jonathanmarvens/go,vishsingh/go,mgyenik/go,cyberroadie/go,polyverse-security/go,CAFxX/go,Jordanzuo/go,jonahglover/go,likesea/go,xiaobodu/go,yasarkunduz/go,constantine001/go,jacobsa/go,JioCloud/go,gohin/go,polyverse-security/go,kakuhiroshi/go,JioCloud/go,shazow/go,vsdutka/go,NunoEdgarGub1/go,Endika/go,yasarkunduz/go,greyhwndz/go,Charlesdong/go-1,myPublicGit/go,jameskumar/go,donnel6809/go,theif519/go,qskycolor/go,parkdy/go,AALEKH/go,jacobxk/go,mbrukman/go,Cofyc/go,uileyar/go,alash3al/go,XuYunnan/go,binarycrusader/go,vsekhar/elastic-go,dpatel06/go,CiscoCloud/go,theass/go,springning/go,ifagnosticism/go,famorted/go,samanalysis/go,jonasi/go,sndnvaps/go,CodyGuo/go,shines77/go,arschles/golang-go,cyberroadie/go,jonasi/go,ObjectiveJoe/go,zhangg/go,ichu501/go,dterei/go,CAFxX/go,parkdy/go,CodyGuo/go,CarterTsai/go,yangzhongj/go,yasarkunduz/go,jefby/go,youprofit/go,dterei/go,jmptrader/go,xujianhai/go,akutz/go,alash3al/go,xiuzhifu/go,WIZARD-CXY/go,malvira/go,willjunspecial/go,Badredapple/go,monetate/go,mgyenik/go,leeric92/go,jdhenke/go,roth1002/go,Jordanzuo/go,greyhwndz/go,ericsnowcurrently/go,xinhuang327/go,stormltf/go,mbrukman/go,qskycolor/go,vsekhar/elastic-go,dterei/go,jameskumar/go,jonathanmarvens/go,ganboing/go-esx,dgnorton/go,baiyunping333/go,miolini/go,nawawi/go,vsdutka/go,snowsnail/go,alash3al/go,Jordanzuo/go,Jordanzuo/go,skotti/go,rachtsingh/gogojuice,NunoEdgarGub1/go,ErikDubbelboer/go,CodyGuo/go,cainiaocome/go,kevinc0825/go,xiuzhifu/go,zhangg/go,xiaobodu/go,CarterTsai/go,andrewchambers/go,theass/go,skotti/go,mwhudson/go,cookerzhu/go,Pulgafree/go,miolini/go,dgnorton/go,rentongzhang/go,CiscoCloud/go,rentongzhang/go,vanloswang/go,jonasi/go,springning/go,myPublicGit/go,yangzhongj/go,CAFxX/go,kevinc0825/go,gohin/go,cainiaocome/go,RBEGamer/go,g522342435/go,sinuos/go,rachtsingh/gogojuice,dgnorton/go,odeke-em/go,kevinc0825/go,ichu501/go,fjballest/golang,Stan-Lin-/go,youprofit/go,cloudflare/go,chinanjjohn2012/go,dafyddcrosby/go,danycoro/go,kim-racktop/go,linux-on-ibm-z/go,xiaobodu/go,nawawi/go,ObjectiveJoe/go,kevinc0825/go,danielsoro/go,arschles/go-1,famorted/go,4ad/go,kakuhiroshi/go,alash3al/go,cookerzhu/go,malvira/go,slavau/go,WIZARD-CXY/go,undergrowthlinear/go,XuYunnan/go,baiyunping333/go,Badredapple/go,golang/go,jonasi/go,jonahglover/go,vsekhar/elastic-go,codestation/go,miolini/go,danycoro/go,zouchao2010/go,mwhudson/go,leeric92/go,g522342435/go,parkdy/go,b54898533/go,josharian/go,stormltf/go,kim-racktop/go,mdp/go,mdp/go,alex-zhang/go,theif519/go,danycoro/go,dpatel06/go,devpadawan/go,Endika/go,ganboing/go-esx,4ad/go,miolini/go,mbrukman/go,beealone/go,xujianhai/go,mgyenik/go,CarterTsai/go,ericsnowcurrently/go,rentongzhang/go,jacobhaven/go,vsekhar/elastic-go,danycoro/go,wangfakang/go-1,RBEGamer/go,jdhenke/go,vsdutka/go,CarterTsai/go,mbrukman/go,nakedgc/go,NichoZhang/go,xiuzhifu/go,mwhudson/go,CarterTsai/go,ErikDubbelboer/go,deft-code/go,kevinc0825/go,malvira/go,b54898533/go,greyhwndz/go,XuYunnan/go,sndnvaps/go,gohin/go,momchil-velikov/go,malvira/go,joshsammut/go,donnel6809/go,undergrowthlinear/go,Samurais/go,greyhwndz/go,binarycrusader/go,ericsnowcurrently/go,yasarkunduz/go,xiuzhifu/go,lihuanghai/go,ifagnosticism/go,snowsnail/go,Samurais/go,Stan-Lin-/go,skatsuta/go,Young55555/go,cookerzhu/go,cnbin/go,roth1002/go,shazow/go,jameskumar/go,cnbin/go,roth1002/go,rentongzhang/go,ganboing/go-esx,xujianhai/go,joshsammut/go,miolini/go,goodlang/good,4ad/go,chinanjjohn2012/go,pgmreddy/go,yangzhongj/go,greyhwndz/go,goodlang/good,cookerzhu/go,chinanjjohn2012/go,binarycrusader/go,sndnvaps/go,g522342435/go,xujianhai/go,samanalysis/go,xiaobodu/go,likesea/go,youprofit/go,cloudflare/go,sinuos/go,devpadawan/go,alash3al/go,jacobxk/go,cyberroadie/go,undergrowthlinear/go,fjballest/golang,ErikDubbelboer/go,cyberroadie/go,donnel6809/go,RBEGamer/go,CAFxX/go,devpadawan/go,Samurais/go,jefby/go,constantine001/go,ErikDubbelboer/go,AALEKH/go,rachtsingh/gogojuice,akutz/go,shines77/go,momchil-velikov/go,cainiaocome/go,sndnvaps/go,myPublicGit/go,cnbin/go,rachtsingh/gogojuice,Jordanzuo/go,skatsuta/go,shines77/go,suncycheng/go,akutz/go,AALEKH/go,joshsammut/go,honsiorovskyi/go,Badredapple/go,Pulgafree/go,Charlesdong/go-1,lihuanghai/go,ObjectiveJoe/go,jmptrader/go,roth1002/go,NunoEdgarGub1/go,odeke-em/go,codestation/go,slavau/go,monetate/go,qskycolor/go,malvira/go,ericsnowcurrently/go,polyverse-security/go,rachtsingh/gogojuice,arschles/go-1,ganboing/go-esx,XuYunnan/go,yangzhongj/go,alash3al/go,XuYunnan/go,roth1002/go,monetate/go,cnbin/go,youprofit/go,g522342435/go,jdhenke/go,donnel6809/go,mwhudson/go,theif519/go,qskycolor/go,vishsingh/go,jacobhaven/go,jameskumar/go,xinhuang327/go,linux-on-ibm-z/go,vsekhar/elastic-go,CiscoCloud/go,willjunspecial/go,g522342435/go,arschles/go-1,constantine001/go,sinuos/go,baiyunping333/go,arschles/golang-go,polyverse-security/go,Pulgafree/go,jonathanmarvens/go,devpadawan/go,jacobsa/go,slavau/go,joshsammut/go,vanloswang/go,leeric92/go,Endika/go,slavau/go,momchil-velikov/go,kakuhiroshi/go,4ad/go,codestation/go,linux-on-ibm-z/go,ErikDubbelboer/go,theass/go,deft-code/go,shines77/go,vsdutka/go,CiscoCloud/go,JioCloud/go,uileyar/go,constantine001/go,ichu501/go,nakedgc/go,zouchao2010/go,kevinc0825/go,dterei/go,sndnvaps/go,yasarkunduz/go,honsiorovskyi/go,mwhudson/go,jacobxk/go,danielsoro/go,greyhwndz/go,cnbin/go,cloudrain21/go,ErikDubbelboer/go,jonasi/go,mdp/go,rentongzhang/go,rachtsingh/gogojuice,jefby/go,xinhuang327/go,pgmreddy/go,beealone/go,jonathanmarvens/go,jdeng/go,uileyar/go,pgmreddy/go,famorted/go,snowsnail/go,honsiorovskyi/go,parkdy/go,jonahglover/go,ifagnosticism/go,mwhudson/go,theass/go,shazow/go,skatsuta/go,codestation/go,ImJasonH/go,jonahglover/go,goodlang/good,NichoZhang/go,Pulgafree/go,cloudflare/go,mgyenik/go,ganboing/go-esx,mdp/go,Cofyc/go,jdeng/go,ichu501/go,dgnorton/go,rachtsingh/gogojuice,RBEGamer/go,b54898533/go,ericsnowcurrently/go,Samurais/go,jdhenke/go,theif519/go,josharian/go,cnbin/go,mbrukman/go,xiaobodu/go,jacobhaven/go,rachtsingh/gogojuice,sosop/go,mgyenik/go,stormltf/go,alex-zhang/go,jefby/go,cyberroadie/go,fjballest/golang,devpadawan/go,cainiaocome/go,danielsoro/go,devpadawan/go,constantine001/go,jacobxk/go,arschles/go-1,beealone/go,yangzhongj/go,mdp/go,jefby/go,josharian/go,zhangg/go,roth1002/go,undergrowthlinear/go,g522342435/go,skatsuta/go,polyverse-security/go,xujianhai/go,zcwfeng/go,likesea/go,GeorgiCodes/go,JioCloud/go,jdhenke/go,monetate/go,codestation/go,zcwfeng/go,Young55555/go,GeorgiCodes/go,andrewchambers/go,NichoZhang/go,binarycrusader/go,goodlang/good,mdp/go,constantine001/go,jacobxk/go,youprofit/go,xiuzhifu/go,xiaobodu/go,undergrowthlinear/go,monetate/go,xiuzhifu/go,WIZARD-CXY/go,ImJasonH/go,Endika/go,snowsnail/go,g522342435/go,GeorgiCodes/go,xiuzhifu/go,uileyar/go,devpadawan/go,theif519/go,vsekhar/elastic-go,codestation/go,jmptrader/go,dterei/go,sinuos/go,danycoro/go,dafyddcrosby/go,xinhuang327/go,sinuos/go,greyhwndz/go,ichu501/go,kakuhiroshi/go,jonathanmarvens/go,jdeng/go,Stan-Lin-/go,uileyar/go,ifagnosticism/go,momchil-velikov/go,slavau/go,dafyddcrosby/go,vsekhar/elastic-go,malvira/go,ErikDubbelboer/go,wangfakang/go-1,momchil-velikov/go,kakuhiroshi/go,linux-on-ibm-z/go,alex-zhang/go,Cofyc/go,Young55555/go,roth1002/go,Badredapple/go,honsiorovskyi/go,skotti/go,albertjin/golang-go,kakuhiroshi/go,gdey/go,akutz/go,JioCloud/go,josharian/go,parkdy/go,danycoro/go,fjballest/golang,mbrukman/go,alex-zhang/go,likesea/go,andrewchambers/go,4ad/go,jmptrader/go,skotti/go,vishsingh/go,xiuzhifu/go,snowsnail/go,gdey/go,mgyenik/go,Young55555/go,yangzhongj/go,vanloswang/go,albertjin/golang-go,jacobsa/go,yuhengye/go,pgmreddy/go,mikekap/go,odeke-em/go,mdp/go,jacobsa/go,cyberroadie/go,yuhengye/go,Samurais/go,nawawi/go,dafyddcrosby/go,alex-zhang/go,jonahglover/go,jacobhaven/go,cloudrain21/go,samanalysis/go,jefby/go,andrewchambers/go,cyberroadie/go,polyverse-security/go,dafyddcrosby/go,nakedgc/go,zcwfeng/go,zhangg/go,pgmreddy/go,myPublicGit/go,Stan-Lin-/go,arschles/golang-go,Cofyc/go,constantine001/go,stormltf/go,Cofyc/go,undergrowthlinear/go,dgnorton/go,alex-zhang/go,kim-racktop/go,golang/go,uileyar/go,gdey/go,ObjectiveJoe/go,parkdy/go,shazow/go,theass/go,cnbin/go,mgyenik/go,samanalysis/go,donnel6809/go,gohin/go,suncycheng/go,Young55555/go,leeric92/go,undergrowthlinear/go,akutz/go,JioCloud/go,kevinc0825/go,ImJasonH/go,likesea/go,dterei/go,albertjin/golang-go,Charlesdong/go-1,golang/go,CiscoCloud/go,jasonxiong/go,samanalysis/go,youprofit/go,gohin/go,mwhudson/go,stormltf/go,AALEKH/go,danielsoro/go,suncycheng/go,Cofyc/go,CodyGuo/go,danycoro/go,dafyddcrosby/go,jonasi/go,wangfakang/go-1,zouchao2010/go,vsekhar/elastic-go,youprofit/go,RBEGamer/go,mikekap/go,ifagnosticism/go,binarycrusader/go,CarterTsai/go,jdhenke/go,linux-on-ibm-z/go,myPublicGit/go,dpatel06/go,nawawi/go,samanalysis/go,ObjectiveJoe/go,lihuanghai/go,NichoZhang/go,samanalysis/go,uileyar/go,ImJasonH/go,jameskumar/go,dafyddcrosby/go,NunoEdgarGub1/go,honsiorovskyi/go,dgnorton/go,zcwfeng/go,zouchao2010/go,kevinc0825/go,springning/go,vishsingh/go,xinhuang327/go,GeorgiCodes/go,chinanjjohn2012/go,xiaobodu/go,qskycolor/go,Stan-Lin-/go,samanalysis/go,Endika/go,dterei/go,Samurais/go,xiaobodu/go,CAFxX/go,odeke-em/go,zouchao2010/go,malvira/go,CAFxX/go,yuhengye/go,dpatel06/go,shines77/go,shazow/go,AALEKH/go,albertjin/golang-go,zcwfeng/go,zcwfeng/go,snowsnail/go,jameskumar/go,NichoZhang/go,derekmarcotte/go,WIZARD-CXY/go,cainiaocome/go,josharian/go,Jordanzuo/go,CAFxX/go,vanloswang/go,cloudrain21/go,josharian/go,leeric92/go,golang/go,skotti/go,mikekap/go,Samurais/go,josharian/go,zouchao2010/go,cloudrain21/go,zouchao2010/go,fjballest/golang,deft-code/go,dafyddcrosby/go,chinanjjohn2012/go,NunoEdgarGub1/go,nakedgc/go,CiscoCloud/go,CodyGuo/go,baiyunping333/go,deft-code/go,jdeng/go,willjunspecial/go,Endika/go,mikekap/go,Young55555/go,derekmarcotte/go,xujianhai/go,ImJasonH/go,deft-code/go,snowsnail/go,NunoEdgarGub1/go,lihuanghai/go,springning/go,ganboing/go-esx,cainiaocome/go,jmptrader/go,golang/go,4ad/go,goodlang/good,jacobxk/go,parkdy/go,yuhengye/go,stormltf/go,ObjectiveJoe/go,jameskumar/go,derekmarcotte/go,yangzhongj/go,Charlesdong/go-1,greyhwndz/go,Badredapple/go,likesea/go,sosop/go,xujianhai/go,joshsammut/go,suncycheng/go,baiyunping333/go,arschles/golang-go,odeke-em/go,qskycolor/go,beealone/go,danielsoro/go,shazow/go,nawawi/go,JioCloud/go,dgnorton/go,Charlesdong/go-1,leeric92/go,rentongzhang/go,polyverse-security/go,ErikDubbelboer/go,binarycrusader/go,uileyar/go,WIZARD-CXY/go,cloudflare/go,xujianhai/go,sosop/go,sndnvaps/go,codestation/go,momchil-velikov/go,mwhudson/go,jmptrader/go,yasarkunduz/go,theass/go,Badredapple/go,yasarkunduz/go,rentongzhang/go,jacobhaven/go,Jordanzuo/go,vanloswang/go,joshsammut/go,jdeng/go,springning/go,ImJasonH/go,ganboing/go-esx,ifagnosticism/go,jefby/go,jonahglover/go,jacobhaven/go,dterei/go,roth1002/go,famorted/go,4ad/go,ganboing/go-esx,baiyunping333/go,vishsingh/go,jdeng/go,Cofyc/go,RBEGamer/go,Jordanzuo/go,skatsuta/go,danielsoro/go,ichu501/go,NunoEdgarGub1/go,joshsammut/go,honsiorovskyi/go,yuhengye/go,likesea/go,myPublicGit/go,skatsuta/go,jameskumar/go,derekmarcotte/go,cloudrain21/go,nawawi/go,sinuos/go,zcwfeng/go,CarterTsai/go,myPublicGit/go,jasonxiong/go,derekmarcotte/go,jasonxiong/go,danielsoro/go,golang/go,Pulgafree/go,yasarkunduz/go,jacobxk/go,nawawi/go,mikekap/go,jonasi/go,xinhuang327/go,sosop/go,wangfakang/go-1,snowsnail/go,gdey/go,theif519/go,derekmarcotte/go,cookerzhu/go,jacobsa/go,cainiaocome/go,Young55555/go,gdey/go,arschles/golang-go,qskycolor/go,chinanjjohn2012/go,NichoZhang/go,skotti/go,cloudflare/go,leeric92/go,vsdutka/go,vishsingh/go,Pulgafree/go,miolini/go,dpatel06/go,lihuanghai/go,b54898533/go,sndnvaps/go,shazow/go,willjunspecial/go,wangfakang/go-1,sosop/go,pgmreddy/go,gohin/go,springning/go,youprofit/go,golang/go,AALEKH/go,alex-zhang/go,zhangg/go,jmptrader/go,jasonxiong/go,gdey/go,b54898533/go,nawawi/go,suncycheng/go,dpatel06/go,kim-racktop/go