configure, configure.in stamp-h.in, and uip/Makefile.in modified to fix

configure, configure.in stamp-h.in, and uip/Makefile.in modified to fix
  MAILGROUP test.
m_getfld.c - added the patch submitted by Richard Cohen to fix
    crashing when mh_profile has no trailing newline.
smtp.c, lock_file.c, m_scratch.c, m_tmpfil.c, mhscmds.c, rcvtty.c, and
  spost.c modified to fix mkstemp bugs. Some I've simply commented out
  because the repair requries either creating another new tempfile
  function (there are 3 already) or cleaning up the existing tmpfile
  functions and all the calls to them. I'm opting for the latter but
  it will take a while.