Update installation doc to mention using https.
Update installation doc to mention using https.

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