Update to exim-4.22:
* IPv6 bug fix incorporated.
* Catch up with changes in makefiles.
* Make portlint happier with respect to DOCSDIR, INFO and spaces.
* Use the new INFO macro.
* Use PATCHFILES instead of patching by hand, now that we don't support
the non-ACL exiscan patch.
This release fixes a few last minute release mistakes from 4.21.
Submitted by: Oliver Eikemeier <firstname.lastname@example.org>
Roll forward over the last revision's backout.
This reinstates exim-4.21, but with PORTREVISION bumped so that folks
unlucky enough to get the bum version can easily upgrade.
Include a patch to fix the reported IPv6 bug.