Update to xauth-1.0.4. Changes:
Add pointers to mailing list, bugzilla, wiki & git repo to README
Man page updates: add "SEE ALSO", update xdm references
Migrate to xorg macros 1.3 & XORG_DEFAULT_OPTIONS
C89 fix
Change xauth_CFLAGS to AM_CFLAGS to make automake-1.10 happier
Replace rsh by ssh the extract/merge example. Rsh is no more.
Initialize ed.used_stdout at the beginning of do_extract()
Fix format error
Correct make distcheck.

(tnn)