Used commit author and not committer when recording changesets

THis should enable us to extract commit statistics per user.

See django/djangoproject.com#1744

Author: bmispelon

trac-env/conf/trac.ini

@@ -63,6 +63,8 @@ projects_url =
 [git]
 cached_repository = enabled
 persistent_cache = enabled
+# We want authors listed, not committers:
+use_committer_id = disabled
 
 [header_logo]
 alt = Django