+PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
+ bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
+ because it is too late at that time, and has no effect.
+
+PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
+ security issue with \' (bugzilla #107). I could not use the
+ PQescapeStringConn() function, because it needs a PGconn value as one of
+ its arguments.
+
+PH/08 When testing addresses using -bt, indicate those final addresses that
+ are duplicates that would not cause an additional delivery. At least one
+ person was confused, thinking that -bt output corresponded to deliveries.
+ (Suppressing duplicates isn't a good idea as you lose the information
+ about possibly different redirections that led to the duplicates.)
+
+PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
+ systems where poll() doesn't work, in particular OS X.
+
+PH/10 Added more information to debugging output for retry time not reached.
+
+PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
+ operations in malware.c.
+
+PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
+ signatures.
+
+PH/13 If write_rejectlog was set false when logging was sent to syslog with
+ syslog_duplication set false, log lines that would normally be written
+ both the the main log and to the reject log were not written to syslog at
+ all.
+
+PH/14 In the default configuration, change the use of "message" in ACL warn
+ statements to "add_header".
+
+PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
+ not followed by a command (e.g. "seen endif").
+
+PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
+ and :defer: in a redirect router. Add forbid_smtp_code to suppress the
+ latter.
+
+PH/17 Added an extra condition to the default value of delay_warning_condition
+ so that it is now:
+
+ ${if or {
+ { match{$h_precedence:}{(?i)bulk|list|junk} }
+ { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} }
+ }{no}{yes}}
+
+ The Auto-Submitted: header is standardised, whereas I don't think
+ Precedence: ever was.
+
+PH/18 Refactored debugging code in route_finduser() to show more information,
+ in particular, the error code if getpwnam() issues one.
+