AC major changed.

AC major changed.
* lisp/gnus-vers.el (gnus-revision-number): Increment to 03.
* configure: Regenerate with autoconf v2.14.1.
* configure.in: Rewrite for using new macros in aclocal.m4.
* aclocal.m4: (AC_ADD_LOAD_PATH, AC_PATH_PACKAGEDIR, AC_CHECK_EMACS,
AC_DEFINE_GNUS_PRODUCT_NAME): New macros.
(AC_PATH_LISPDIR): Set `lispdir' to ".../site-lisp/t-gnus" by default.
(AC_CHECK_EMACS_FLAVOR): Rename from `AC_XEMACS_P'; check for MULE' as well.
(AM_PATH_LISPDIR): Remove.
* acinclude.m4: Remove.
* lisp/dgnushack.el: Don't add "/usr/share/emacs/site-lisp" to `load-path'.
* lisp/gnus-ems.el (gnus-ems-redefine): Defalias
`gnus-summary-set-display-table' to `(lambda ())' instead of `ignore'.