Log Message:
mail/postgrey: Update to 1.37

* 2016-09-22: version 1.37
   - added initial test suite
   - testing using travis-ci (https://travis-ci.org/schweikert/postgrey)
   - removed IP pool-detection code for --lookup-by-net, because it matched
     also the naming of some big hosters like facebook (#32, Michal Petrucha,
     Andrew Ayer, Jon Sailor)
   - fix early logging of errors and warnings to syslog
   - simplified IP matching code
   - added support for IPv6 whitelists with netmask
   - add network-range based whitelist for Office 365 (Holger Stember)
   - updated whitelist