Merge branch 'maint-0.3.5' into release-0.3.5

changes/bug13221

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+  o Minor bugfixes (logging):
+    - Correct a misleading error message when IPv4Only or IPv6Only
+      is used but the resolved address can not be interpreted as an
+      address of the specified IP version.  Fixes bug 13221; bugfix
+      on 0.2.3.9-alpha.  Patch from Kris Katterjohn.

changes/bug27199

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+  o Minor bugfixes (rust):
+    - Abort on panic in all build profiles, instead of potentially unwinding
+      into C code. Fixes bug 27199; bugfix on 0.3.3.1-alpha.

changes/bug28698

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+  o Minor bugfix (logging):
+    - Avoid logging about relaxing circuits when their time is fixed.
+      Fixes bug 28698; bugfix on 0.2.4.7-alpha

changes/bug29017

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+  o Minor bugfixes (stats):
+    - When ExtraInfoStatistics is 0, stop including PaddingStatistics in
+      relay and bridge extra-info documents. Fixes bug 29017;
+      bugfix on 0.3.1.1-alpha.

changes/bug29144

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+  o Minor bugfixes (logging):
+    - Log the correct port number for listening sockets when "auto" is
+      used to let Tor pick the port number.  Previously, port 0 was
+      logged instead of the actual port number.  Fixes bug 29144;
+      bugfix on 0.3.5.1-alpha.  Patch from Kris Katterjohn.

changes/bug29665

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+  o Minor bugfixes (single onion services):
+    - Allow connections to single onion services to remain idle without
+      being disconnected. Relays acting as rendezvous points for
+      single onion services were mistakenly closing idle established
+      rendezvous circuits after 60 seconds, thinking that they are unused
+      directory-fetching circuits that had served their purpose. Fixes
+      bug 29665; bugfix on 0.2.1.26.