Log Message:
Update scponly to 4.8.

Changes since 4.3:
    - fix support for quota and passwd when running within the
      chroot (exec pre-chroot)
    - disallow rsync and svnserve from being run as daemons that
      listen on a port
    - switch to getopt_long for command processing, use getopt for
      sftp-server, svnserve, and quota
    - abort processing on commands that require getopt when getopt
      is not available
    - switched to slightly optimized and more compact debug code
    - fix unison support within chroots
    - fix for unison command execution bug
    - allow multiple users with the same uid using USER environment
      variable
    - added missing semicolon to helper.c
    - fixes the configure.in script to not define HAVE_OPTRESET, not
      even to a value of 0
    - fixes that hopefully improve the optarg compilation situation
    - UNISON $HOME environment fix
    - fixes to setup_chroot.sh/in