Changes file for #18616

changes/bug18616

+  o Major bugfixes (directory mirrors):
+    - Fix broken DirPort self-checks. Decide to advertise begindir
+      support the same way we decide to advertise DirPorts.
+      Include additional config options in the list that might
+      change the content of a relay's descriptor.
+      Resolves #18616, bugfix on 0c8e042c30946faa in #12538 in
+      0.2.8.1-alpha. Patch by "teor".