codereview.settings: add GIT_NUMBER_FOOTER setting.

git_cl.py

Index: git_cl.py
diff --git a/git_cl.py b/git_cl.py
index 07c528c36f55f38af2af6d12f03a1f81dcbe0238..6cfb4bedb8a5e90b5f50a52258bffb90e51e1c83 100755
--- a/git_cl.py
+++ b/git_cl.py
@@ -646,6 +646,7 @@ class Settings(object):
     self.project = None
     self.force_https_commit_url = None
     self.pending_ref_prefix = None
+    self.git_number_footer = None
 
   def LazyUpdateIfNeeded(self):
     """Updates the settings from a codereview.settings file, if available."""
@@ -881,6 +882,14 @@ class Settings(object):
           'pending-ref-prefix', error_ok=True)
     return self.pending_ref_prefix
 
+  def GetHasGitNumberFooter(self):
+    # TODO(tandrii): this has to be removed after Rietveld is read-only.

[tandrii(chromium), 2016/09/09 22:17:03]

only while Rietveld Cls can be landed.

+    # see also bugs http://crbug.com/642493 and http://crbug.com/600469.
+    if not self.git_number_footer:
+      self.git_number_footer = self._GetRietveldConfig(
+          'git-number-footer', error_ok=True)
+    return self.git_number_footer
+
   def _GetRietveldConfig(self, param, **kwargs):
     return self._GetConfig('rietveld.' + param, **kwargs)
 
@@ -2953,6 +2962,7 @@ def LoadCodereviewSettingsFromFile(fileobj):
   SetProperty('cpplint-ignore-regex', 'LINT_IGNORE_REGEX', unset_error_ok=True)
   SetProperty('project', 'PROJECT', unset_error_ok=True)
   SetProperty('pending-ref-prefix', 'PENDING_REF_PREFIX', unset_error_ok=True)
+  SetProperty('git-number-footer', 'GIT_NUMBER_FOOTER', unset_error_ok=True)
   SetProperty('run-post-upload-hook', 'RUN_POST_UPLOAD_HOOK',
               unset_error_ok=True)