Refactor Redis HA docs to also include Sentinel
Refactor Redis HA docs to also include Sentinel

LUMC/gitlabhq,mmkassem/gitlabhq,iiet/iiet-git,screenpages/gitlabhq,screenpages/gitlabhq,dreampet/gitlab,allysonbarros/gitlabhq,t-zuehlsdorff/gitlabhq,darkrasid/gitlabhq,openwide-java/gitlabhq,mr-dxdy/gitlabhq,mmkassem/gitlabhq,mmkassem/gitlabhq,daiyu/gitlab-zh,htve/GitlabForChinese,axilleas/gitlabhq,SVArago/gitlabhq,darkrasid/gitlabhq,daiyu/gitlab-zh,shinexiao/gitlabhq,htve/GitlabForChinese,shinexiao/gitlabhq,axilleas/gitlabhq,stoplightio/gitlabhq,dplarson/gitlabhq,SVArago/gitlabhq,mr-dxdy/gitlabhq,allysonbarros/gitlabhq,stoplightio/gitlabhq,icedwater/gitlabhq,jirutka/gitlabhq,axilleas/gitlabhq,t-zuehlsdorff/gitlabhq,icedwater/gitlabhq,allysonbarros/gitlabhq,jirutka/gitlabhq,screenpages/gitlabhq,darkrasid/gitlabhq,dreampet/gitlab,shinexiao/gitlabhq,daiyu/gitlab-zh,mr-dxdy/gitlabhq,axilleas/gitlabhq,openwide-java/gitlabhq,LUMC/gitlabhq,dplarson/gitlabhq,icedwater/gitlabhq,stoplightio/gitlabhq,openwide-java/gitlabhq,htve/GitlabForChinese,iiet/iiet-git,icedwater/gitlabhq,t-zuehlsdorff/gitlabhq,stoplightio/gitlabhq,darkrasid/gitlabhq,shinexiao/gitlabhq,dreampet/gitlab,LUMC/gitlabhq,iiet/iiet-git,jirutka/gitlabhq,dplarson/gitlabhq,screenpages/gitlabhq,LUMC/gitlabhq,jirutka/gitlabhq,daiyu/gitlab-zh,SVArago/gitlabhq,mmkassem/gitlabhq,allysonbarros/gitlabhq,htve/GitlabForChinese,mr-dxdy/gitlabhq,openwide-java/gitlabhq,dplarson/gitlabhq,SVArago/gitlabhq,dreampet/gitlab,iiet/iiet-git,t-zuehlsdorff/gitlabhq