Don't include group-member.h.

Don't include group-member.h.
Include euidaccess.h.
(eaccess): Rewrite function to set the real uid and gid temporarily
to the effective uid and gid, then invoke 'access', and then set the
real uid and gid back.  On systems that lack setreuid or setregid,
fall back on the kludges in euidaccess.  Before, it would not work
for e.g., files with ACLs, files that were marked immutable,
or on file systems mounted read-only.