spamassassin: assign karma for autolearn message
spamassassin: assign karma for autolearn message

also removed 'use lib', to be consistent with most other plugins
and improved grammar

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