Log Message:
Update to 3.6.4

Changelog:
2015-11-01  v3.6.4  a ref-create bug in wild repos was fixed

                    some contrib code related to AD integration, and to
                    redmine user aliases

                    teach Alias.pm a few new tricks

                    remove a race condition in 'create' command that affected
                    the 'default roles' setting

                    make 'who-pushed' more efficient (local push logs, and
                    'tip search')

                    'gitolite query-rc' learns '-d' ('--dump') option