[Mimedefang] sendmail 8.12.11 is available

[Marco Berizzi]

Release notes about milter:

..
When a milter invokes smfi_delrcpt() compare the supplied
recipient address also against the printable addresses
of the current list to deal with rewritten addresses.
Based on patch from Sean Hanson of The Asylum.
..
LIBMILTER: Add extra checks in case a broken MTA sends bogus data
to libmilter.  Based on code review by Rob Grzywinski.
..