Log Message:
Update to mimedefang 2.67, thanks to Klaus Heinz

Release 2.67 adds the following features since 2.65 (there was no public
2.66 release):
* The ability for mimedefang-multiplexor to use poll rather than select.
  This removes the FD_SETSIZE limit on the number of file descriptors
  the multiplexor can handle.
* Support for FPROTD version 6 daemonized virus scanner.

2.65
There is only one change since 2.64: An error in the way the embedded
perl interpreter was initialized has been fixed. This fixes problems
on the Debian HPPA architecture and possibly others.

2.64
This is a minor bugfix release;
* Add support for NOD32 command-line scanner
* Add support for Sophos "savscan" scanner