ENH: add filter for sendmail-{auth,spam}. Closes gh-20
BF: add jail.conf definitions for sendmail* filters
Merge pull request #631 from grooverdan/sendmail

ENH: add filter for sendmail-{auth,spam}. Closes gh-20
DOC: Add reference to action argument values which contain ","

Closes gh-632
ENH: wider regex for RBL and sendmail-spam
BF: email address as arg1 in sendmail filters
ENH: rename sendmail-spam to sendmail-reject