Fix mentionable reference extraction caching.
Fix mentionable reference extraction caching.

allysonbarros/gitlabhq,htve/GitlabForChinese,mr-dxdy/gitlabhq,yatish27/gitlabhq,daiyu/gitlab-zh,mmkassem/gitlabhq,SVArago/gitlabhq,screenpages/gitlabhq,darkrasid/gitlabhq,iiet/iiet-git,dreampet/gitlab,SVArago/gitlabhq,shinexiao/gitlabhq,duduribeiro/gitlabhq,darkrasid/gitlabhq,mr-dxdy/gitlabhq,yatish27/gitlabhq,Soullivaneuh/gitlabhq,dwrensha/gitlabhq,axilleas/gitlabhq,Datacom/gitlabhq,screenpages/gitlabhq,t-zuehlsdorff/gitlabhq,jirutka/gitlabhq,dplarson/gitlabhq,daiyu/gitlab-zh,jirutka/gitlabhq,mr-dxdy/gitlabhq,jirutka/gitlabhq,larryli/gitlabhq,screenpages/gitlabhq,LUMC/gitlabhq,iiet/iiet-git,larryli/gitlabhq,mmkassem/gitlabhq,dwrensha/gitlabhq,Soullivaneuh/gitlabhq,stoplightio/gitlabhq,mr-dxdy/gitlabhq,t-zuehlsdorff/gitlabhq,dwrensha/gitlabhq,iiet/iiet-git,shinexiao/gitlabhq,LUMC/gitlabhq,openwide-java/gitlabhq,axilleas/gitlabhq,SVArago/gitlabhq,jrjang/gitlabhq,t-zuehlsdorff/gitlabhq,jrjang/gitlabhq,Soullivaneuh/gitlabhq,jrjang/gitlabhq,mrb/gitlabhq,icedwater/gitlabhq,allysonbarros/gitlabhq,t-zuehlsdorff/gitlabhq,jrjang/gitlab-ce,SVArago/gitlabhq,ttasanen/gitlabhq,jrjang/gitlab-ce,jrjang/gitlab-ce,jrjang/gitlabhq,ttasanen/gitlabhq,icedwater/gitlabhq,stoplightio/gitlabhq,jirutka/gitlabhq,duduribeiro/gitlabhq,shinexiao/gitlabhq,dplarson/gitlabhq,dwrensha/gitlabhq,htve/GitlabForChinese,dreampet/gitlab,yatish27/gitlabhq,ttasanen/gitlabhq,larryli/gitlabhq,icedwater/gitlabhq,martijnvermaat/gitlabhq,duduribeiro/gitlabhq,yatish27/gitlabhq,Datacom/gitlabhq,openwide-java/gitlabhq,dreampet/gitlab,daiyu/gitlab-zh,screenpages/gitlabhq,mrb/gitlabhq,darkrasid/gitlabhq,darkrasid/gitlabhq,daiyu/gitlab-zh,mmkassem/gitlabhq,larryli/gitlabhq,axilleas/gitlabhq,dplarson/gitlabhq,duduribeiro/gitlabhq,allysonbarros/gitlabhq,Soullivaneuh/gitlabhq,openwide-java/gitlabhq,jrjang/gitlab-ce,dreampet/gitlab,stoplightio/gitlabhq,iiet/iiet-git,axilleas/gitlabhq,LUMC/gitlabhq,htve/GitlabForChinese,shinexiao/gitlabhq,stoplightio/gitlabhq,openwide-java/gitlabhq,martijnvermaat/gitlabhq,mrb/gitlabhq,dplarson/gitlabhq,Datacom/gitlabhq,martijnvermaat/gitlabhq,LUMC/gitlabhq,allysonbarros/gitlabhq,htve/GitlabForChinese,mmkassem/gitlabhq,martijnvermaat/gitlabhq,icedwater/gitlabhq,ttasanen/gitlabhq,Datacom/gitlabhq,mrb/gitlabhq