Log Message:
Update from version 0.20 to 0.22.

Changes (hard to dig out of CPAN; there's version confusion, so this
is from the source):

0.22  Sun May 18 09:10:19 EDT 2008
  - removed constant CL_SCAN_PHISHING_DOMAINLIST
  - removed support for maxratio and maxmailrec

0.21  Mon Jan 14 14:39:43 MST 2008
  - updated to work with missing defines in new libclamav-0.92