doc: many updates to go1.6.txt
doc: many updates to go1.6.txt

Change-Id: I97d2315a1f978fbc4fd9e7f5f860f8e29ae43470
Reviewed-on: https://go-review.googlesource.com/17743
Reviewed-by: Russ Cox <5ad239cb8a44f659eaaee0aa1ea5b94947abe557@golang.org>

nawawi/go,Samurais/go,kim-racktop/go,codestation/go,Cofyc/go,deft-code/go,mwhudson/go,christopher-henderson/Go,theif519/go,Samurais/go,momchil-velikov/go,4ad/go,mwhudson/go,Endika/go,codestation/go,binarycrusader/go,Samurais/go,cloudflare/go,miolini/go,deft-code/go,theif519/go,ganboing/go-esx,deft-code/go,suncycheng/go,Cofyc/go,goodlang/good,cloudflare/go,polyverse-security/go,sndnvaps/go,roth1002/go,vanloswang/go,nawawi/go,akutz/go,polyverse-security/go,4ad/go,derekmarcotte/go,derekmarcotte/go,golang/go,kim-racktop/go,polyverse-security/go,sndnvaps/go,sndnvaps/go,Cofyc/go,ImJasonH/go,sndnvaps/go,codestation/go,vanloswang/go,roth1002/go,ImJasonH/go,akutz/go,sndnvaps/go,ImJasonH/go,ganboing/go-esx,cloudflare/go,akutz/go,roth1002/go,CAFxX/go,codestation/go,derekmarcotte/go,mwhudson/go,golang/go,josharian/go,codestation/go,codestation/go,CAFxX/go,Cofyc/go,mwhudson/go,vsekhar/elastic-go,momchil-velikov/go,cloudflare/go,Endika/go,mwhudson/go,nawawi/go,suncycheng/go,golang/go,theif519/go,roth1002/go,Samurais/go,momchil-velikov/go,kim-racktop/go,miolini/go,vanloswang/go,linux-on-ibm-z/go,linux-on-ibm-z/go,kim-racktop/go,suncycheng/go,Endika/go,Cofyc/go,miolini/go,Samurais/go,goodlang/good,goodlang/good,vanloswang/go,Endika/go,vanloswang/go,vsekhar/elastic-go,polyverse-security/go,goodlang/good,momchil-velikov/go,binarycrusader/go,CAFxX/go,derekmarcotte/go,vsekhar/elastic-go,Endika/go,cyberroadie/go,Cofyc/go,ImJasonH/go,linux-on-ibm-z/go,CAFxX/go,miolini/go,4ad/go,kim-racktop/go,josharian/go,suncycheng/go,4ad/go,ganboing/go-esx,akutz/go,kim-racktop/go,polyverse-security/go,akutz/go,golang/go,cloudflare/go,Samurais/go,roth1002/go,sndnvaps/go,ImJasonH/go,4ad/go,vanloswang/go,suncycheng/go,josharian/go,josharian/go,Cofyc/go,miolini/go,cloudflare/go,theif519/go,CAFxX/go,cyberroadie/go,akutz/go,polyverse-security/go,cyberroadie/go,vsekhar/elastic-go,theif519/go,nawawi/go,cloudflare/go,kim-racktop/go,josharian/go,derekmarcotte/go,sndnvaps/go,binarycrusader/go,theif519/go,Cofyc/go,derekmarcotte/go,vanloswang/go,binarycrusader/go,goodlang/good,golang/go,roth1002/go,miolini/go,linux-on-ibm-z/go,ganboing/go-esx,mwhudson/go,vsekhar/elastic-go,ganboing/go-esx,momchil-velikov/go,polyverse-security/go,deft-code/go,vsekhar/elastic-go,CAFxX/go,momchil-velikov/go,goodlang/good,golang/go,vsekhar/elastic-go,suncycheng/go,binarycrusader/go,ganboing/go-esx,4ad/go,linux-on-ibm-z/go,ImJasonH/go,nawawi/go,linux-on-ibm-z/go,akutz/go,nawawi/go,momchil-velikov/go,nawawi/go,Samurais/go,polyverse-security/go,binarycrusader/go,derekmarcotte/go,ganboing/go-esx,deft-code/go,binarycrusader/go,roth1002/go,ImJasonH/go,sndnvaps/go,ganboing/go-esx,codestation/go,deft-code/go,akutz/go,theif519/go,4ad/go,theif519/go,golang/go,Endika/go,Samurais/go,codestation/go,kim-racktop/go,cloudflare/go,cyberroadie/go,deft-code/go,suncycheng/go,CAFxX/go,josharian/go,4ad/go,cyberroadie/go,deft-code/go,cyberroadie/go,linux-on-ibm-z/go,Endika/go,miolini/go,mwhudson/go,golang/go,josharian/go,suncycheng/go,derekmarcotte/go,goodlang/good,linux-on-ibm-z/go,vanloswang/go,Endika/go,nawawi/go,josharian/go,ImJasonH/go,miolini/go,roth1002/go,momchil-velikov/go,mwhudson/go,CAFxX/go,cyberroadie/go,cyberroadie/go,goodlang/good,vsekhar/elastic-go,binarycrusader/go