Ruby

• process.c (proc_getmaxgroups, proc_setmaxgroups): Process#maxgroups
  and Process#maxgroups= now raise NotImplementedError if the
  platform don't support supplementary groups concept.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31090 b2dd03c8-39d4-4d8f-98ff-823fe69b080e