Bumped the plugin version number for the variant with caching.  Fixed a typo in the perldoc.
Bumped the plugin version number for the variant with caching.  Fixed a typo in the perldoc.

smtpd/qpsmtpd,priyadi/qpsmtpd,salvis/qpsmtpd,sieutruc/qpsmtpd,sieutruc/qpsmtpd,msimerson/qpsmtpd,priyadi/qpsmtpd,priyadi/qpsmtpd,sieutruc/qpsmtpd,salvis/qpsmtpd,smtpd/qpsmtpd,msimerson/qpsmtpd