Merge branch 'maint-0.2.4' into release-0.2.4

changes/bug8639

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+  o Normal bugfixes:
+     - When launching a resolve request on behalf of an AF_UNIX control
+       socket, omit the address field of the new entry connection, used in
+       subsequent controller events, rather than letting tor_dup_addr() set
+       it to "<unknown address type>".  Fixes bug 8639.

changes/bug8822

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+  o Major bugfixes (windows):
+    - Prevent failures on Windows Vista and later when rebuilding the
+      microdescriptor cache. Diagnosed by Robert Ransom. Fixes bug 8822;
+      bugfix on 0.2.4.12-alpha.
+

changes/bug8965

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+  o Removed documentation:
+    - Remove some of the older contents of doc/ as obsolete; move others
+      to torspec.git. Fixes bug 8965.

changes/bug9047

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+  o Minor bugfixes:
+    - If for some reason we fail to write a microdescriptor while
+      rebuilding the cache, do not let the annotations from that
+      microdescriptor linger in the cache file, and do not let the
+      microdescriptor stay recorded as present in its old location.
+      Fixes bug 9047; bugfix on 0.2.2.6-alpha.

changes/bug9063

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+  o Normal bugfixes:
+    - Close any circuit that has more cells queued than the spec permits.
+      Fixes bug #9063; bugfix on 0.2.4.12.