ENH: dovecot filter additions for session, time value and blank user

ChangeLog

@@ -38,6 +38,9 @@ ver. 0.8.11 (2013/XX/XXX) - wanna-be-released
   Alexander Dietrich
    * action.d/sendmail-common.conf -- added common sendmail settings file
      and made the sender display name configurable
+  Steven Hiscocks
+   * filter.d/dovecot - Addition of session, time values and possible blank
+     user
 
 ver. 0.8.10 (2013/06/12) - wanna-be-secure
 -----------

config/filter.d/dovecot.conf

@@ -17,7 +17,7 @@ _daemon = dovecot(-auth)?
 # Values:  TEXT
 #
 failregex = ^%(__prefix_line)s(pam_unix(\(\S+\))?:)?\s+authentication failure; logname=\S* uid=\S* euid=\S* tty=dovecot ruser=\S* rhost=<HOST>(\s+user=\S*)?\s*$
-            ^%(__prefix_line)s(pop3|imap)-login: (Info: )?(Aborted login|Disconnected)(: Inactivity)? \((no auth attempts|auth failed, \d+ attempts|tried to use disabled \S+ auth)\):( user=<\S+>,)?( method=\S+,)? rip=<HOST>, lip=(\d{1,3}\.){3}\d{1,3}(, TLS( handshaking)?(: Disconnected)?)?\s*$
+            ^%(__prefix_line)s(pop3|imap)-login: (Info: )?(Aborted login|Disconnected)(: Inactivity)? \(((no auth attempts|auth failed, \d+ attempts)( in \d+ secs)?|tried to use disabled \S+ auth)\):( user=<\S*>,)?( method=\S+,)? rip=<HOST>, lip=(\d{1,3}\.){3}\d{1,3}(, session=<\w+>)?(, TLS( handshaking)?(: Disconnected)?)?\s*$
 
 # Option:  ignoreregex
 # Notes.:  regex to ignore. If this regex matches, the line is ignored.

testcases/files/logs/dovecot

@@ -14,3 +14,5 @@ Jun 13 21:48:06 platypus dovecot: pop3-login: Disconnected: Inactivity (no auth
 Jun 13 20:20:21 platypus dovecot: imap-login: Disconnected (no auth attempts): rip=180.189.168.166, lip=113.212.99.194, TLS handshaking: Disconnected
 Jun 23 00:52:43 vhost1-ua dovecot: pop3-login: Disconnected: Inactivity (auth failed, 1 attempts): user=<info>, method=PLAIN, rip=193.95.245.163, lip=176.214.13.210
 
+Jul 02 13:49:31 hostname dovecot[442]: pop3-login: Aborted login (auth failed, 1 attempts in 17 secs): user=<test>, method=PLAIN, rip=192.51.100.13, lip=203.0.113.17, session=<YADINsQCDs5BH8Pg>
+Jul 02 13:49:32 hostname dovecot[442]: pop3-login: Disconnected (no auth attempts in 58 secs): user=<>, rip=192.51.100.13, lip=203.0.113.17, session=<LgDINsQCkttVIMPg>