Fixed documentation and added redis/sentinel roles instruction
Fixed documentation and added redis/sentinel roles instruction

dplarson/gitlabhq,openwide-java/gitlabhq,stoplightio/gitlabhq,t-zuehlsdorff/gitlabhq,darkrasid/gitlabhq,dplarson/gitlabhq,jirutka/gitlabhq,darkrasid/gitlabhq,jirutka/gitlabhq,jirutka/gitlabhq,axilleas/gitlabhq,htve/GitlabForChinese,axilleas/gitlabhq,LUMC/gitlabhq,t-zuehlsdorff/gitlabhq,openwide-java/gitlabhq,LUMC/gitlabhq,iiet/iiet-git,daiyu/gitlab-zh,t-zuehlsdorff/gitlabhq,axilleas/gitlabhq,dreampet/gitlab,dreampet/gitlab,LUMC/gitlabhq,axilleas/gitlabhq,mmkassem/gitlabhq,iiet/iiet-git,openwide-java/gitlabhq,mmkassem/gitlabhq,htve/GitlabForChinese,LUMC/gitlabhq,darkrasid/gitlabhq,daiyu/gitlab-zh,stoplightio/gitlabhq,dplarson/gitlabhq,mmkassem/gitlabhq,htve/GitlabForChinese,darkrasid/gitlabhq,mmkassem/gitlabhq,iiet/iiet-git,dplarson/gitlabhq,dreampet/gitlab,stoplightio/gitlabhq,iiet/iiet-git,dreampet/gitlab,daiyu/gitlab-zh,daiyu/gitlab-zh,htve/GitlabForChinese,stoplightio/gitlabhq,openwide-java/gitlabhq,jirutka/gitlabhq,t-zuehlsdorff/gitlabhq