Log Message:
Updated gitolite to 3.6.6.

2016-09-08  v3.6.6  simple but important fix for a future perl deprecation
                    (perl will be removing "." from @INC in 5.24)

                    'perms' now requires a '-c' to activate batch mode
                    (should not affect interactive use but check your scripts
                    perhaps?)

                    gitolite setup now accepts a '-m' option to supply a
                    custom message (useful when it is used by a script)

From Harry Waddell in PR 52293.