Log Message:
-----------
Provide a more helpful error message when there is an autoconf version
mismatch; backpatch.
Tags:
----
REL8_0_STABLE
Modified Files:
--------------
pgsql:
configure.in (r1.398.4.20 -> r1.398.4.21)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/configure.in?r1=1.398.4.20&r2=1.398.4.21)