Merge branch 'maint-0.3.5' into maint-0.4.0

changes/bug30344

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+  o Minor bugfixes (connection):
+    - Avoid reading data from closed connections, which can cause needless
+      loops in libevent and infinite loops in Shadow. Fixes bug 30344; bugfix
+      on 0.1.1.1-alpha.

changes/bug31939

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+  o Minor bugfixes (tls, logging):
+    - Log TLS read buffer length bugs once, rather than filling the logs
+      with similar warnings. Fixes bug 31939; bugfix on 0.3.0.4-rc.

changes/ticket28970

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+  o Minor bugfixes (clietn, hidden service v3):
+    - Fix a BUG() assertion that occurs within a very small race window between
+      a client intro circuit opens and its descriptor that gets cleaned up from
+      the cache. The circuit is now closed which will trigger a re-fetch of the
+      descriptor and continue the HS connection. Fixes bug 28970; bugfix on
+      0.3.2.1-alpha.

changes/ticket31548

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+  o Major bugfixes (hidden service v3):
+    - Make onion service always use the exact amount of configured intro points
+      (or less due to node exlusion). Before, a service could sometimes pick
+      more intro points than configured with the
+      HiddenServiceNumIntroductionPoints option. Fixes bug 31548; bugfix on
+      0.3.2.1-alpha.
+

changes/ticket32058

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+  o Minor bugfixes (mainloop, periodic events):
+    - Periodic events enabled flag was not unset properly when shutting down tor
+      cleanly. This had the side effect to not re-enable periodic events when
+      tor_api.h is used to relaunch tor after a shutdown. Fixes bug 32058;
+      bugfix on 0.3.3.1-alpha.