autoupdate produces changes for the current ax_* macros from the archive

[dima . pasechnik]

Dear all,

what is the procedure for fixing autoconf-2.71-incompatible macros in
the autoconf archive?
(We use a few of them in out project, and recently started to switch to
the new autoconf, in the process discovering few incompatibilities in
ax_* macros).
https://trac.sagemath.org/ticket/30668

For instance, autoupdate provides replacements for 
AC_WARNING in ax_compare_version.m4 from 
https://www.gnu.org/software/autoconf-archive/ax_compare_version.html

Also, there are few weird replacements for aliases generated, e.g.
-AU_ALIAS([CHECK_SSL], [AX_CHECK_OPENSSL])
+AU_ALIAS([AX_CHECK_OPENSSL], [AX_CHECK_OPENSSL])
in ax_check_openssl.m4 
https://www.gnu.org/software/autoconf-archive/ax_check_openssl.html

Thanks
Dima