Release 4.17.4

Changes since 4.17.3:

Alejandro Colomar (12):
      Revert "lib/, src/: Use local time for human-readable dates"
      lib/getdate.y: Ignore time-zone information and use UTC
      src/chfn.c: Partially revert "lib/, src/: Use strsep(3) instead of its pattern"
      src/chfn.c: Use stpsep() instead of its pattern
      src/chfn.c: Add local variable to refer to the separated field
      src/chfn.c: copy_field(): Rename local variable
      lib/commonio.c: Rely on the POSIX.1-2008 behavior of realpath(3)
      lib/fs/readlink/: readlinknul(): Use ssize_t to simplify
      autogen.sh: Promote -Wsign-compare to an error
      lib/sizeof.h: ssizeof(): Add signed variant of sizeof
      src/lastlog.c: Use ssizeof() to avoid a -Wsign-compare diagnostic
      tests/unit/test_xasprintf.c: Fix sign-mismatch diagnostic

Chris Hofstaedtler (2):
      configure.ac: stop checking for utmp location
      configure.ac: be deterministic about passwd location

Iker Pedrosa (3):
      lib/, src/: update audit messages
      lib/: audit function for groups
      src/: update group audit messages

Michael Vetter (1):
      doc/: Remove list of distributions

Serge Hallyn (1):
      release 4.17.4