2014-01-06 Eric Blake <eblake@redhat.com>
+ md5, sha1, sha256, sha512: support older autoconf
+ * m4/00gnulib.m4 (m4_divert_push): Wrap diversion stack
+ for autoconf < 2.63b.
+
include_next: port to autoconf 2.63
* m4/gnulib-common.m4 (AS_VAR_COPY): Define if missing.