Merge branch 'mj/process-feature-freeze' into 'master'

Green pipeline for feature freeze PROCESS

See merge request gitlab-org/gitlab-ce!23809

PROCESS.md

@@ -86,10 +86,13 @@ star, smile, etc.). Some good tips about code reviews can be found in our
 
 ## Feature freeze on the 7th for the release on the 22nd
 
-After 7th at 23:59 (Pacific Time Zone) of each month, RC1 of the upcoming
-release (to be shipped on the 22nd) is created and deployed to GitLab.com and
-the stable branch for this release is frozen, which means master is no longer
-merged into it.  Merge requests may still be merged into master during this
+After 7th at 23:59 (Pacific Time Zone) of each month, stable branch and RC1 
+of the upcoming release (to be shipped on the 22nd) is created and deployed to GitLab.com. 
+The stable branch is frozen at the most recent "qualifying commit" on master.
+A "qualifying commit" is one that is pushed before the feature freeze cutoff time
+and that passes all CI jobs (green pipeline).
+
+Merge requests may still be merged into master during this
 period, but they will go into the _next_ release, unless they are manually
 cherry-picked into the stable branch.