Add `robots.txt` to the list of reserved namespaces
Add `robots.txt` to the list of reserved namespaces

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