unanticipated breakage. If that happens, just need to back out the
changes under the "suexec-stuff" tag. However, the better solution will
probably be to fix the PHP scripts that break by adding the proper
groups in the call to suexec (in the web page, see below) or by fixing
the backend Perl script that breaks.

This fix is primarily to address the problem of some users being in more
groups (cause of subgroups) then the max number of groups allowed
(NGROUPS).  The groups that really mattered (say, for creating an
experiment in a subgroup) could be left out cause they were at the end
of the list.

* suexec.c: Change how groups are handled. Instead of taking a single
  gid argument (the gid to setgid as), now takes a comma separated list
  of groups. Further, instead of doing a setgroups to the user's entire
  group list as specified in the groups file (getgroups), setgroups to
  just the groups listed on the command line, plus the user...