Merge branch 'ab/require-perl-5.8'

* ab/require-perl-5.8:
  perl: use "use warnings" instead of -w
  perl: bump the required Perl version to 5.8 from 5.6.[21]

git-cvsserver.perl

@@ -15,6 +15,7 @@
 ####
 ####
 
+use 5.008;
 use strict;
 use warnings;
 use bytes;