Added missing registry-related flags to the master config docs.
Added missing registry-related flags to the master config docs.

Review: https://reviews.apache.org/r/65184

asamerh4/mesos,Gilbert88/mesos,abudnik/mesos,chhsia0/mesos,jpeach/mesos,abudnik/mesos,jpeach/mesos,andschwa/mesos,reneploetz/mesos,jpeach/mesos,kaysoky/mesos,kaysoky/mesos,andschwa/mesos,abudnik/mesos,asamerh4/mesos,dforsyth/mesos,Gilbert88/mesos,dforsyth/mesos,dforsyth/mesos,Gilbert88/mesos,abudnik/mesos,asamerh4/mesos,chhsia0/mesos,dforsyth/mesos,kaysoky/mesos,abudnik/mesos,abudnik/mesos,kaysoky/mesos,asamerh4/mesos,reneploetz/mesos,gsantovena/mesos,andschwa/mesos,jpeach/mesos,chhsia0/mesos,kaysoky/mesos,reneploetz/mesos,andschwa/mesos,asamerh4/mesos,reneploetz/mesos,reneploetz/mesos,Gilbert88/mesos,chhsia0/mesos,andschwa/mesos,dforsyth/mesos,abudnik/mesos,jpeach/mesos,reneploetz/mesos,gsantovena/mesos,gsantovena/mesos,kaysoky/mesos,Gilbert88/mesos,chhsia0/mesos,asamerh4/mesos,dforsyth/mesos,Gilbert88/mesos,asamerh4/mesos,Gilbert88/mesos,gsantovena/mesos,kaysoky/mesos,jpeach/mesos,gsantovena/mesos,dforsyth/mesos,chhsia0/mesos,jpeach/mesos,andschwa/mesos,andschwa/mesos,gsantovena/mesos,chhsia0/mesos,reneploetz/mesos,gsantovena/mesos