add changes file for bug 10929

changes/bug10929

@@ -0,0 +1,6 @@
+  - Minor bugfixes:
+    - Fix build warnings about missing "a2x" comment when building the
+      manpages from scratch on OpenBSD; OpenBSD calls it "a2x.py".
+      Fixes bug 10929; bugfix on tor-0.2.2.9-alpha. Patch from
+      Dana Koch.
+