Commit local changes from server made by Brecht

Never, ever, ever such situation should happen.

From reading the change it seems it's related on making
it possible to build releases from the buildbot.

master.cfg

@@ -4,7 +4,7 @@
 # <pep8 compliant>
 
 # List of the branches being built automatically overnight
-NIGHT_SCHEDULE_BRANCHES = ["master"]
+NIGHT_SCHEDULE_BRANCHES = ["master", "blender-v2.81-release"]
 
 # Dictionary that the buildmaster pays attention to.
 c = BuildmasterConfig = {}
@@ -76,7 +76,7 @@ def schedule_force_build(name):
                     name="branch",
                     label="Branch:",
                     default="master",
-                    regex=r'^[a-zA-Z0-9][A-Za-z0-9_-]*$'),
+                    regex=r'^[a-zA-Z0-9][A-Za-z0-9\._-]*$'),
                 # Hide revision. We don't want to allow anyone to overwrite the
                 # master build with an older version. Could be added back once we
                 # have authentication.