documentation: Document Read Access +2 aka Upload Access
documentation: Document Read Access +2 aka Upload Access

We failed to document this feature, even though we added it way
back in 2.0.24.  Document it now.

Change-Id: I5088a1b13fca0ef3d57d55c1be5e71420c5e64ec
Signed-off-by: Shawn O. Pearce <f3ea74d906fa9fe97c1fef6bad9cb871485c7045@google.com>

bpollack/gerrit,TonyChai24/test,atdt/gerrit,thesamet/gerrit,makholm/gerrit-ceremony,ashang/aaron-gerrit,Saulis/gerrit,thesamet/gerrit,pkdevbox/gerrit,dwhipstock/gerrit,basilgor/gerrit,skurfuerst/gerrit,gerrit-review/gerrit,1yvT0s/gerrit,Overruler/gerrit,zommarin/gerrit,skurfuerst/gerrit,TonyChai24/test,qtproject/qtqa-gerrit,skurfuerst/gerrit,joshuawilson/merrit,atdt/gerrit,basilgor/gerrit,gcoders/gerrit,dwhipstock/gerrit,supriyantomaftuh/gerrit,jeblair/gerrit,bootstraponline-archive/gerrit-mirror,teamblueridge/gerrit,Distrotech/gerrit,keerath/gerrit_newssh,gcoders/gerrit,austinchic/Gerrit,catrope/gerrit,evanchueng/gerrit,WANdisco/gerrit,pkdevbox/gerrit,renchaorevee/gerrit,basilgor/gerrit,quyixia/gerrit,gcoders/gerrit,TonyChai24/test,Distrotech/gerrit,Seinlin/gerrit,m1kah/gerrit-contributions,bootstraponline-archive/gerrit-mirror,jackminicloud/test,GerritCodeReview/gerrit,MerritCR/merrit,jeblair/gerrit,pkdevbox/gerrit,thinkernel/gerrit,thinkernel/gerrit,gerrit-review/gerrit,CandyShop/gerrit,Team-OctOS/host_gerrit,Team-OctOS/host_gerrit,duboisf/gerrit,Seinlin/gerrit,zommarin/gerrit,Overruler/gerrit,pkdevbox/gerrit,keerath/gerrit_newssh,gracefullife/gerrit,MerritCR/merrit,WANdisco/gerrit,gcoders/gerrit,dwhipstock/gerrit,sudosurootdev/gerrit,1yvT0s/gerrit,hdost/gerrit,gracefullife/gerrit,midnightradio/gerrit,midnightradio/gerrit,WANdisco/gerrit,renchaorevee/gerrit,Distrotech/gerrit,midnightradio/gerrit,sudosurootdev/gerrit,netroby/gerrit,Seinlin/gerrit,dwhipstock/gerrit,hdost/gerrit,atdt/gerrit,supriyantomaftuh/gerrit,gerrit-review/gerrit,WANdisco/gerrit,makholm/gerrit-ceremony,qtproject/qtqa-gerrit,jeblair/gerrit,qtproject/qtqa-gerrit,midnightradio/gerrit,netroby/gerrit,Saulis/gerrit,MerritCR/merrit,anminhsu/gerrit,keerath/gerrit_newssh,gcoders/gerrit,GerritCodeReview/gerrit,1yvT0s/gerrit,pkdevbox/gerrit,anminhsu/gerrit,jackminicloud/test,netroby/gerrit,evanchueng/gerrit,Seinlin/gerrit,anminhsu/gerrit,MerritCR/merrit,ashang/aaron-gerrit,gerrit-review/gerrit,TonyChai24/test,renchaorevee/gerrit,thinkernel/gerrit,qtproject/qtqa-gerrit,bpollack/gerrit,sudosurootdev/gerrit,WANdisco/gerrit,cjh1/gerrit,jackminicloud/test,quyixia/gerrit,bootstraponline-archive/gerrit-mirror,jackminicloud/test,austinchic/Gerrit,qtproject/qtqa-gerrit,ckamm/gerrit,CandyShop/gerrit,ckamm/gerrit,anminhsu/gerrit,quyixia/gerrit,GerritCodeReview/gerrit,hdost/gerrit,bootstraponline-archive/gerrit-mirror,teamblueridge/gerrit,1yvT0s/gerrit,MerritCR/merrit,qtproject/qtqa-gerrit,skurfuerst/gerrit,bpollack/gerrit,gracefullife/gerrit,Overruler/gerrit,zommarin/gerrit,m1kah/gerrit-contributions,joshuawilson/merrit,anminhsu/gerrit,jackminicloud/test,catrope/gerrit,GerritCodeReview/gerrit,bootstraponline-archive/gerrit-mirror,pkdevbox/gerrit,Saulis/gerrit,catrope/gerrit,netroby/gerrit,Team-OctOS/host_gerrit,austinchic/Gerrit,joshuawilson/merrit,bpollack/gerrit,netroby/gerrit,Distrotech/gerrit,thesamet/gerrit,gcoders/gerrit,thesamet/gerrit,duboisf/gerrit,joshuawilson/merrit,hdost/gerrit,midnightradio/gerrit,quyixia/gerrit,renchaorevee/gerrit,Distrotech/gerrit,CandyShop/gerrit,supriyantomaftuh/gerrit,MerritCR/merrit,evanchueng/gerrit,pkdevbox/gerrit,joshuawilson/merrit,hdost/gerrit,gerrit-review/gerrit,netroby/gerrit,supriyantomaftuh/gerrit,Overruler/gerrit,atdt/gerrit,thesamet/gerrit,makholm/gerrit-ceremony,catrope/gerrit,GerritCodeReview/gerrit,MerritCR/merrit,bpollack/gerrit,midnightradio/gerrit,gerrit-review/gerrit,renchaorevee/gerrit,duboisf/gerrit,Team-OctOS/host_gerrit,teamblueridge/gerrit,cjh1/gerrit,Distrotech/gerrit,joshuawilson/merrit,Saulis/gerrit,sudosurootdev/gerrit,netroby/gerrit,quyixia/gerrit,TonyChai24/test,jackminicloud/test,keerath/gerrit_newssh,hdost/gerrit,GerritCodeReview/gerrit,1yvT0s/gerrit,ashang/aaron-gerrit,CandyShop/gerrit,keerath/gerrit_newssh,bpollack/gerrit,sudosurootdev/gerrit,bootstraponline-archive/gerrit-mirror,GerritCodeReview/gerrit,teamblueridge/gerrit,m1kah/gerrit-contributions,thinkernel/gerrit,Seinlin/gerrit,Saulis/gerrit,basilgor/gerrit,renchaorevee/gerrit,Saulis/gerrit,ckamm/gerrit,gracefullife/gerrit,evanchueng/gerrit,thinkernel/gerrit,thesamet/gerrit,supriyantomaftuh/gerrit,dwhipstock/gerrit,thinkernel/gerrit,supriyantomaftuh/gerrit,zommarin/gerrit,anminhsu/gerrit,Team-OctOS/host_gerrit,ashang/aaron-gerrit,duboisf/gerrit,thinkernel/gerrit,TonyChai24/test,jackminicloud/test,cjh1/gerrit,GerritCodeReview/gerrit,cjh1/gerrit,dwhipstock/gerrit,teamblueridge/gerrit,quyixia/gerrit,renchaorevee/gerrit,WANdisco/gerrit,TonyChai24/test,m1kah/gerrit-contributions,evanchueng/gerrit,Team-OctOS/host_gerrit,anminhsu/gerrit,jeblair/gerrit,ckamm/gerrit,Seinlin/gerrit,austinchic/Gerrit,atdt/gerrit,Distrotech/gerrit,gerrit-review/gerrit,dwhipstock/gerrit,Overruler/gerrit,joshuawilson/merrit,Seinlin/gerrit,qtproject/qtqa-gerrit,rtyley/mini-git-server,basilgor/gerrit,ckamm/gerrit,gracefullife/gerrit,Team-OctOS/host_gerrit,zommarin/gerrit,ashang/aaron-gerrit,WANdisco/gerrit,hdost/gerrit,joshuawilson/merrit,gcoders/gerrit,rtyley/mini-git-server,Overruler/gerrit,thesamet/gerrit,MerritCR/merrit,supriyantomaftuh/gerrit,makholm/gerrit-ceremony,quyixia/gerrit,CandyShop/gerrit