Merge branch 'master' of gitlab.com:gitlab-org/gitlab-ce

doc/update/6.0-to-7.3.md → doc/update/6.x-or-7.x-to-7.3.md

-# From 6.0 to 7.3
-# GitLab 7.3 has not been released yet!
+# From 6.x or 7.x to 7.3
+This allows you to upgrade any version of GitLab from 6.0 and up (including 7.0 and up) to 7.3.
 ## Global issue numbers