xdm: update to 1.1.15.

This release fixes a failure to build with the upcoming gcc 14, cleans
up several other compiler warnings, fixes a bug in the generation of the
xdm.service file for systemd, and removes a lot of dead code checks for
platforms & features that have not been supported since the conversion
from Imake to autoconf in 2005.

Alan Coopersmith (26):
      gitlab CI: stop requiring Signed-off-by in commits
      Remove "All rights reserved" from Oracle copyright notices
      gitlab CI: Update to latest CI templates & Debian stable release
      configure: Use LT_INIT from libtool 2 instead of deprecated AC_PROG_LIBTOOL
      Fix -Wincompatible-pointer-types warning from gcc (issue #15)
      greeter: Handle const qualification differences between Solaris & Linux PAM
      greeter: Constify value argument to SetValue()
      unifdef ultrix
      unifdef sony
      unifdef PowerMAX_OS
      unifdef __convex__
      unifdef hpux
      unifdef pegasus
      unifdef __UNIXOS2__
      unifdef QNX4
      unifdef AF_CHAOS
      unifdef AF_DECnet
      unifdef SYSV
      unifdef SIGNALS_RESET_WHEN_CAUGHT
      unifdef UNRELIABLE_SIGNALS
      unifdef FRAGILE_DEV_MEM
      Remove support for SVR4 systems other than Solaris/illumos
      include <shadow.h> on all platforms with HAVE_GETSPNAM set, not just SVR4
      unifdef __osf__
      session.c: clear -Wredundant-decls warnings on Solaris
      xdm 1.1.15

Alisson Bruno (1):
      Fix --with-systemd-daemon option

(wiz)