Allow underscore as the first char for project names.
Allow underscore as the first char for project names.

Not sure if the default_regex really has to be expanded for this special use case. We tried to extend only the project_name_regex first, but that didn't help.

fscherwi/gitlabhq,since2014/gitlabhq,revaret/gitlabhq,WSDC-NITWarangal/gitlabhq,chenrui2014/gitlabhq,mavimo/gitlabhq,cui-liqiang/gitlab-ce,fantasywind/gitlabhq,liyakun/gitlabhq,shinexiao/gitlabhq,jrjang/gitlab-ce,bozaro/gitlabhq,bbodenmiller/gitlabhq,MauriceMohlek/gitlabhq,phinfonet/mobbr-gitlabhq,pkallberg/tjenare,it33/gitlabhq,jrjang/gitlabhq,fearenales/gitlabhq,rfeese/gitlab-ce,wangcan2014/gitlabhq,NKMR6194/gitlabhq,duduribeiro/gitlabhq,mrb/gitlabhq,julianengel/gitlabhq,ZeoAlliance/gitlabhq,gopeter/gitlabhq,eliasp/gitlabhq,folpindo/gitlabhq,bozaro/gitlabhq,adaiguoguo/gitlab_globalserarch,flashbuckets/gitlabhq,htve/GitlabForChinese,cui-liqiang/gitlab-ce,nmav/gitlabhq,NuLL3rr0r/gitlabhq,icedwater/gitlabhq,jirutka/gitlabhq,TheWatcher/gitlabhq,nguyen-tien-mulodo/gitlabhq,fantasywind/gitlabhq,hzy001/gitlabhq,michaKFromParis/gitlabhq,iiet/iiet-git,fscherwi/gitlabhq,youprofit/gitlabhq,mavimo/gitlabhq,michaKFromParis/gitlabhq,pjknkda/gitlabhq,vjustov/gitlabhq,TheWatcher/gitlabhq,rumpelsepp/gitlabhq,WSDC-NITWarangal/gitlabhq,sakishum/gitlabhq,fantasywind/gitlabhq,dvrylc/gitlabhq,Soullivaneuh/gitlabhq,rhels/gitlabhq,jrjang/gitlab-ce,SkyWei/gitlabhq,copystudy/gitlabhq,zrbsprite/gitlabhq,SVArago/gitlabhq,fendoudeqingchunhh/gitlabhq,salipro4ever/gitlabhq,fearenales/gitlabhq,whluwit/gitlabhq,tempbottle/gitlabhq,t-zuehlsdorff/gitlabhq,ZeoAlliance/gitlabhq,screenpages/gitlabhq,darkrasid/gitlabhq,koreamic/gitlabhq,Keystion/gitlabhq,Devin001/gitlabhq,pkgr/gitlabhq,htve/GitlabForChinese,hacsoc/gitlabhq,Tyrael/gitlabhq,williamherry/gitlabhq,Razer6/gitlabhq,stellamiranda/mobbr-gitlabhq,ikappas/gitlabhq,WSDC-NITWarangal/gitlabhq,phinfonet/mobbr-gitlabhq,adaiguoguo/gitlab_globalserarch,mrb/gitlabhq,liyakun/gitlabhq,allistera/gitlabhq,stanhu/gitlabhq,tim-hoff/gitlabhq,vjustov/gitlabhq,kotaro-dev/gitlab-6-9,jvanbaarsen/gitlabhq,koreamic/gitlabhq,michaKFromParis/sparkslab,gopeter/gitlabhq,tk23/gitlabhq,H3Chief/gitlabhq,ngpestelos/gitlabhq,gopeter/gitlabhq,tim-hoff/gitlabhq,rumpelsepp/gitlabhq,jrjang/gitlab-ce,louahola/gitlabhq,jirutka/gitlabhq,vjustov/gitlabhq,yuyue2013/ss,sonalkr132/gitlabhq,martijnvermaat/gitlabhq,nmav/gitlabhq,dreampet/gitlab,rfeese/gitlab-ce,Keystion/gitlabhq,childbamboo/gitlabhq,flashbuckets/gitlabhq,allysonbarros/gitlabhq,zrbsprite/gitlabhq,stoplightio/gitlabhq,OtkurBiz/gitlabhq,LytayTOUCH/gitlabhq,allistera/gitlabhq,childbamboo/gitlabhq,mathstuf/gitlabhq,NARKOZ/gitlabhq,manfer/gitlabhq,theodi/gitlabhq,ksoichiro/gitlabhq,DanielZhangQingLong/gitlabhq,since2014/gitlabhq,screenpages/gitlabhq,dplarson/gitlabhq,ordiychen/gitlabhq,tk23/gitlabhq,sue445/gitlabhq,yama07/gitlabhq,axilleas/gitlabhq,ordiychen/gitlabhq,liyakun/gitlabhq,luzhongyang/gitlabhq,OlegGirko/gitlab-ce,OtkurBiz/gitlabhq,DanielZhangQingLong/gitlabhq,ttasanen/gitlabhq,mrb/gitlabhq,yfaizal/gitlabhq,nguyen-tien-mulodo/gitlabhq,williamherry/gitlabhq,123Haynes/gitlabhq,fpgentil/gitlabhq,8thcolor/testing-public-gitlabhq,pkgr/gitlabhq,tim-hoff/gitlabhq,michaKFromParis/gitlabhq,jrjang/gitlabhq,OlegGirko/gitlab-ce,NARKOZ/gitlabhq,mmkassem/gitlabhq,dplarson/gitlabhq,rfeese/gitlab-ce,Soullivaneuh/gitlabhq,MauriceMohlek/gitlabhq,Devin001/gitlabhq,yatish27/gitlabhq,williamherry/gitlabhq,kotaro-dev/gitlab-6-9,sonalkr132/gitlabhq,8thcolor/testing-public-gitlabhq,stellamiranda/mobbr-gitlabhq,tim-hoff/gitlabhq,dplarson/gitlabhq,Kambda/Mobbr,kitech/gitlabhq,allysonbarros/gitlabhq,LUMC/gitlabhq,dvrylc/gitlabhq,OlegGirko/gitlab-ce,initiummedia/gitlabhq,Razer6/gitlabhq,dukex/gitlabhq,tk23/gitlabhq,joalmeid/gitlabhq,dreampet/gitlab,lvfeng1130/gitlabhq,jaepyoung/gitlabhq,yonglehou/gitlabhq,ksoichiro/gitlabhq,it33/gitlabhq,bladealslayer/gitlabhq,cncodog/gitlab,daiyu/gitlab-zh,zBMNForks/gitlabhq,stanhu/gitlabhq,duduribeiro/gitlabhq,dreampet/gitlab,koreamic/gitlabhq,windymid/test2,eliasp/gitlabhq,NuLL3rr0r/gitlabhq,manfer/gitlabhq,t-zuehlsdorff/gitlabhq,bozaro/gitlabhq,salipro4ever/gitlabhq,rumpelsepp/gitlabhq,johnmyqin/gitlabhq,SkyWei/gitlabhq,nmav/gitlabhq,t-zuehlsdorff/gitlabhq,Telekom-PD/gitlabhq,mente/gitlabhq,adaiguoguo/gitlab_globalserarch,sakishum/gitlabhq,jirutka/gitlabhq,NKMR6194/gitlabhq,chadyred/gitlabhq,fpgentil/gitlabhq,sonalkr132/gitlabhq,allistera/gitlabhq,per-garden/gitlabhq,pkgr/gitlabhq,kitech/gitlabhq,since2014/gitlabhq,youprofit/gitlabhq,johnmyqin/gitlabhq,jvanbaarsen/gitlabhq,NARKOZ/gitlabhq,joalmeid/gitlabhq,123Haynes/gitlabhq,Tyrael/gitlabhq,icedwater/gitlabhq,michaKFromParis/gitlabhqold,chenrui2014/gitlabhq,Keystion/gitlabhq,mavimo/gitlabhq,chadyred/gitlabhq,sue445/gitlabhq,duduribeiro/gitlabhq,cncodog/gitlab,rhels/gitlabhq,nmav/gitlabhq,H3Chief/gitlabhq,sakishum/gitlabhq,atomaka/gitlabhq,sideci-sample/sideci-sample-gitlabhq,theonlydoo/gitlabhq,jrjang/gitlabhq,martinma4/gitlabhq,rhels/gitlabhq,tempbottle/gitlabhq,revaret/gitlabhq,szechyjs/gitlabhq,zBMNForks/gitlabhq,H3Chief/gitlabhq,folpindo/gitlabhq,stanhu/gitlabhq,larryli/gitlabhq,htve/GitlabForChinese,Tyrael/gitlabhq,wangcan2014/gitlabhq,pulkit21/gitlabhq,theonlydoo/gitlabhq,pulkit21/gitlabhq,stellamiranda/mobbr-gitlabhq,koreamic/gitlabhq,ibiart/gitlabhq,youprofit/gitlabhq,Soullivaneuh/gitlabhq,Datacom/gitlabhq,per-garden/gitlabhq,kemenaran/gitlabhq,gorgee/gitlabhq,Devin001/gitlabhq,pjknkda/gitlabhq,yuyue2013/ss,akumetsuv/gitlab,fscherwi/gitlabhq,dwrensha/gitlabhq,manfer/gitlabhq,kitech/gitlabhq,gorgee/gitlabhq,allysonbarros/gitlabhq,eliasp/gitlabhq,dvrylc/gitlabhq,axilleas/gitlabhq,martinma4/gitlabhq,DanielZhangQingLong/gitlabhq,hq804116393/gitlabhq,windymid/test2,zrbsprite/gitlabhq,LytayTOUCH/gitlabhq,gopeter/gitlabhq,julianengel/gitlabhq,sekcheong/gitlabhq,ngpestelos/gitlabhq,shinexiao/gitlabhq,revaret/gitlabhq,salipro4ever/gitlabhq,kemenaran/gitlabhq,cinderblock/gitlabhq,copystudy/gitlabhq,zBMNForks/gitlabhq,it33/gitlabhq,martijnvermaat/gitlabhq,cinderblock/gitlabhq,szechyjs/gitlabhq,openwide-java/gitlabhq,Tyrael/gitlabhq,michaKFromParis/sparkslab,chenrui2014/gitlabhq,delkyd/gitlabhq,ferdinandrosario/gitlabhq,hacsoc/gitlabhq,phinfonet/mobbr-gitlabhq,revaret/gitlabhq,whluwit/gitlabhq,fantasywind/gitlabhq,michaKFromParis/gitlabhqold,LUMC/gitlabhq,k4zzk/gitlabhq,szechyjs/gitlabhq,johnmyqin/gitlabhq,Burick/gitlabhq,delkyd/gitlabhq,per-garden/gitlabhq,stanhu/gitlabhq,initiummedia/gitlabhq,mathstuf/gitlabhq,daiyu/gitlab-zh,yonglehou/gitlabhq,jvanbaarsen/gitlabhq,yama07/gitlabhq,louahola/gitlabhq,aaronsnyder/gitlabhq,sekcheong/gitlabhq,Exeia/gitlabhq,ayufan/gitlabhq,Kambda/Mobbr,cui-liqiang/gitlab-ce,wangcan2014/gitlabhq,dplarson/gitlabhq,Telekom-PD/gitlabhq,whluwit/gitlabhq,louahola/gitlabhq,fgbreel/gitlabhq,mente/gitlabhq,luzhongyang/gitlabhq,adaiguoguo/gitlab_globalserarch,dvrylc/gitlabhq,atomaka/gitlabhq,screenpages/gitlabhq,TheWatcher/gitlabhq,ayufan/gitlabhq,NKMR6194/gitlabhq,initiummedia/gitlabhq,dukex/gitlabhq,sekcheong/gitlabhq,fendoudeqingchunhh/gitlabhq,yfaizal/gitlabhq,duduribeiro/gitlabhq,NARKOZ/gitlabhq,yulchitaj/TEST3,hq804116393/gitlabhq,johnmyqin/gitlabhq,michaKFromParis/sparkslab,SkyWei/gitlabhq,szechyjs/gitlabhq,chenrui2014/gitlabhq,cui-liqiang/gitlab-ce,allistera/gitlabhq,it33/gitlabhq,tempbottle/gitlabhq,Burick/gitlabhq,flashbuckets/gitlabhq,martijnvermaat/gitlabhq,luzhongyang/gitlabhq,ZeoAlliance/gitlabhq,darkrasid/gitlabhq,darkrasid/gitlabhq,yulchitaj/TEST3,mmkassem/gitlabhq,manfer/gitlabhq,hzy001/gitlabhq,fscherwi/gitlabhq,pjknkda/gitlabhq,ibiart/gitlabhq,delkyd/gitlabhq,aaronsnyder/gitlabhq,nguyen-tien-mulodo/gitlabhq,sakishum/gitlabhq,rebecamendez/gitlabhq,lvfeng1130/gitlabhq,cncodog/gitlab,Datacom/gitlabhq,screenpages/gitlabhq,bbodenmiller/gitlabhq,pkallberg/tjenare,ngpestelos/gitlabhq,shinexiao/gitlabhq,akumetsuv/gitlab,mr-dxdy/gitlabhq,axilleas/gitlabhq,bozaro/gitlabhq,k4zzk/gitlabhq,since2014/gitlabhq,shinexiao/gitlabhq,mathstuf/gitlabhq,WSDC-NITWarangal/gitlabhq,lvfeng1130/gitlabhq,Soullivaneuh/gitlabhq,H3Chief/gitlabhq,yatish27/gitlabhq,williamherry/gitlabhq,louahola/gitlabhq,dukex/gitlabhq,Telekom-PD/gitlabhq,sideci-sample/sideci-sample-gitlabhq,bigsurge/gitlabhq,mavimo/gitlabhq,Datacom/gitlabhq,daiyu/gitlab-zh,axilleas/gitlabhq,ksoichiro/gitlabhq,mente/gitlabhq,icedwater/gitlabhq,kitech/gitlabhq,gorgee/gitlabhq,copystudy/gitlabhq,yatish27/gitlabhq,ordiychen/gitlabhq,fpgentil/gitlabhq,folpindo/gitlabhq,bigsurge/gitlabhq,Exeia/gitlabhq,SVArago/gitlabhq,bigsurge/gitlabhq,Devin001/gitlabhq,martijnvermaat/gitlabhq,LytayTOUCH/gitlabhq,NuLL3rr0r/gitlabhq,mr-dxdy/gitlabhq,wangcan2014/gitlabhq,aaronsnyder/gitlabhq,martinma4/gitlabhq,fearenales/gitlabhq,Kambda/mobbr-gitlabhq,fgbreel/gitlabhq,Kambda/Mobbr,rumpelsepp/gitlabhq,123Haynes/gitlabhq,michaKFromParis/gitlabhqold,LytayTOUCH/gitlabhq,jrjang/gitlab-ce,t-zuehlsdorff/gitlabhq,zrbsprite/gitlabhq,Telekom-PD/gitlabhq,ttasanen/gitlabhq,folpindo/gitlabhq,icedwater/gitlabhq,cncodog/gitlab,yatish27/gitlabhq,8thcolor/testing-public-gitlabhq,Exeia/gitlabhq,openwide-java/gitlabhq,TheWatcher/gitlabhq,yuyue2013/ss,Datacom/gitlabhq,martinma4/gitlabhq,eliasp/gitlabhq,xuvw/gitlabhq,MauriceMohlek/gitlabhq,dukex/gitlabhq,luzhongyang/gitlabhq,fgbreel/gitlabhq,bbodenmiller/gitlabhq,rebecamendez/gitlabhq,mr-dxdy/gitlabhq,dreampet/gitlab,openwide-java/gitlabhq,pulkit21/gitlabhq,rebecamendez/gitlabhq,stoplightio/gitlabhq,aaronsnyder/gitlabhq,Kambda/mobbr-gitlabhq,chadyred/gitlabhq,mmkassem/gitlabhq,jaepyoung/gitlabhq,tk23/gitlabhq,jaepyoung/gitlabhq,childbamboo/gitlabhq,yfaizal/gitlabhq,hq804116393/gitlabhq,ferdinandrosario/gitlabhq,yama07/gitlabhq,julianengel/gitlabhq,ferdinandrosario/gitlabhq,yonglehou/gitlabhq,windymid/test2,mr-dxdy/gitlabhq,yulchitaj/TEST3,whluwit/gitlabhq,hzy001/gitlabhq,Razer6/gitlabhq,liyakun/gitlabhq,rhels/gitlabhq,ayufan/gitlabhq,fgbreel/gitlabhq,fendoudeqingchunhh/gitlabhq,ayufan/gitlabhq,theodi/gitlabhq,joalmeid/gitlabhq,vjustov/gitlabhq,zBMNForks/gitlabhq,youprofit/gitlabhq,iiet/iiet-git,rebecamendez/gitlabhq,ibiart/gitlabhq,MauriceMohlek/gitlabhq,ksoichiro/gitlabhq,k4zzk/gitlabhq,stoplightio/gitlabhq,allysonbarros/gitlabhq,fearenales/gitlabhq,rfeese/gitlab-ce,daiyu/gitlab-zh,michaKFromParis/gitlabhqold,michaKFromPar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