Log Message:
Update to 0.68-1, and reenable the milter (OK'd by recht).  Changes:

0.68-1
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Fixed RAR support.

0.68
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This version fixes a crash with some RAR archives generated by the Bagle worm,
also a few important fixes have been backported from CVS.

We strongly encourage users to install the 0.70-rc version (released today).

0.67
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This release fixes a memory management problem (platform dependent; can lead
to a DoS attack) with messages that only have attachments (reported by Oliver
Brandmueller). It also contains patches for a few problems found in 0.66 and
has better Cygwin support.