Merge branch 'maint-0.3.5' into release-0.3.5

changes/bug30916

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+  o Minor bugfixes (relay):
+    - Avoid crashing when starting with a corrupt keys directory where
+      the old ntor key and the new ntor key are identical. Fixes bug 30916;
+      bugfix on 0.2.4.8-alpha.

changes/bug31107

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+  o Minor bugfixes (logging, protocol violations):
+    - Do not log a nonfatal assertion failure when receiving a VERSIONS
+      cell on a connection using the obsolete v1 link protocol. Log a
+      protocol_warn instead. Fixes bug 31107; bugfix on 0.2.4.4-alpha.

changes/bug31408

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+  o Major bugfixes (torrc):
+    - Stop ignoring torrc options after an %include directive, when the
+      included directory ends with a file that does not contain any config
+      options. (But does contain comments or whitespace.)
+      Fixes bug 31408; bugfix on 0.3.1.1-alpha.

changes/bug31837

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+  o Minor bugfixes (testing):
+    - When testing port rebinding, don't busy-wait for tor to log. Instead,
+      actually sleep for a short time before polling again. Also improve the
+      formatting of control commands and log messages.
+      Fixes bug 31837; bugfix on 0.3.5.1-alpha.

changes/ticket31466

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+  o Minor bugfixes (logging):
+    - Rate-limit our the logging message about the obsolete .exit notation.
+      Previously, there was no limit on this warning, which could potentially
+      be triggered many times by a hostile website. Fixes bug 31466;
+      bugfix on 0.2.2.1-alpha.