Log Message:
Update to 3.6.3:

MAINT: Modest performance improvements
MAINT: Significant improvements in accuracy (from scratch-testing anyway)
BUGFIX: "No TrustedDeliveryAgent" error occurs erroneously in some cases
BUGFIX: ChangeUserOnParse can format incorrectly
BUGFIX: The dspam_logrotate tool does not support multiple mailboxes
BUGFIX: Memory leak in Bayesian Noise Reduction
BUGFIX: LDAP calls fail to close connection to server
BUGFIX: Bayesian database is created even on LDAP user verification failure