+PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
+
+PP/05 Variable $av_failed, true if the AV scanner deferred.
+ Bugzilla 1078. Patch from John Horne.
+
+PP/06 Stop make process more reliably on build failure.
+ Bugzilla 1087. Patch from Heiko Schlittermann.
+
+PP/07 Make maildir_use_size_file an _expandable_ boolean.
+ Bugzilla 1089. Patch from Heiko Schlittermann.
+
+PP/08 Handle ${run} returning more data than OS pipe buffer size.
+ Bugzilla 1131. Patch from Holger Weiß.
+
+PP/09 Handle IPv6 addresses with SPF.
+ Bugzilla 860. Patch from Wolfgang Breyha.
+