Merge branch 'maint-0.4.2' into bug40076_042

changes/bug29029

-  o Minor bugfixes (logging, onion services):
-    - Stop logging "Tried to establish rendezvous on non-OR circuit..." as
-      a warning. Instead, log it as a protocol warning, because there is
-      nothing that relay operators can do to fix it. Fixes bug 29029;
-      bugfix on 0.2.5.7-rc.

changes/bug29034

-  o Major bugfixes (Onion service reachability):
-    - Properly clean up the introduction point map when circuits change purpose
-      from onion service circuits to pathbias, measurement, or other circuit types.
-      This should fix some service-side instances of introduction point failure.
-      Fixes bug 29034; bugfix on 0.3.2.1-alpha.

changes/bug29036

-  o Minor bugfix (continuous integration):
-    - Reset coverage state on disk after Travis CI has finished. This is being
-      done to prevent future gcda file merge errors which causes the test suite
-      for the process subsystem to fail. The process subsystem was introduced
-      in 0.4.0.1-alpha. Fixes bug 29036; bugfix on 0.2.9.15.

changes/bug29040

-  o Minor bugfixes (onion services):
-    - Avoid crashing if ClientOnionAuthDir (incorrectly) contains
-      more than one private key for a hidden service. Fixes bug 29040;
-      bugfix on 0.3.5.1-alpha.

changes/bug29042

-  o Minor bugfixes (logging):
-    - Log more information at "warning" level when unable to read a private
-      key; log more information ad "info" level when unable to read a public
-      key. We had warnings here before, but they were lost during our
-      NSS work. Fixes bug 29042; bugfix on 0.3.5.1-alpha.

changes/bug29135

-  o Minor bugfixes (onion services, logging):
-    - In hs_cache_store_as_client() log an HSDesc we failed to parse at Debug
-      loglevel. Tor used to log it at Warning loglevel, which caused
-      very long log lines to appear for some users. Fixes bug 29135; bugfix on
-      0.3.2.1-alpha.

changes/bug29144

-  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/bug29145

-  o Minor bugfixes (compilation, testing):
-    - Silence a compiler warning in test-memwipe.c on OpenBSD.  Fixes
-      bug 29145; bugfix on 0.2.9.3-alpha.  Patch from Kris Katterjohn.

changes/bug29161

-  o Minor bugfixes (tests):
-    - Detect and suppress "bug" warnings from the util/time test on Windows.
-      Fixes bug 29161; bugfix on 0.2.9.3-alpha.

changes/bug29175_035

-  o Major bugfixes (networking):
-    - Gracefully handle empty username/password fields in SOCKS5
-      username/password auth messsage and allow SOCKS5 handshake to
-      continue. Fixes bug 29175; bugfix on 0.3.5.1-alpha.

changes/bug29241

-  o Major bugfixes (NSS, relay):
-    - When running with NSS, disable TLS 1.2 ciphersuites that use SHA384
-      for their PRF. Due to an NSS bug, the TLS key exporters for these
-      ciphersuites don't work -- which caused relays to fail to handshake
-      with one another when these ciphersuites were enabled.
-      Fixes bug 29241; bugfix on 0.3.5.1-alpha.

changes/bug29244

-  o Minor bugfixes (build, compatibility):
-    - Update Cargo.lock file to match the version made by the latest
-      version of Rust, so that "make distcheck" will pass again.
-      Fixes bug 29244; bugfix on 0.3.3.4-alpha.

changes/bug29530_035

-  o Minor bugfixes (testing):
-    - Downgrade some LOG_ERR messages in the address/* tests to warnings.
-      The LOG_ERR messages were occurring when we had no configured network.
-      We were failing the unit tests, because we backported 28668 to 0.3.5.8,
-      but did not backport 29530. Fixes bug 29530; bugfix on 0.3.5.8.

changes/bug29599

-  o Minor bugfixes (memory management, testing):
-    - Stop leaking parts of the shared random state in the shared-random unit
-      tests. Fixes bug 29599; bugfix on 0.2.9.1-alpha.

changes/bug29601

-  o Minor bugfixes (Windows, CI):
-    - Skip the Appveyor 32-bit Windows Server 2016 job, and 64-bit Windows
-      Server 2012 R2 job. The remaining 2 jobs still provide coverage of
-      64/32-bit, and Windows Server 2016/2012 R2. Also set fast_finish, so
-      failed jobs terminate the build immediately.
-      Fixes bug 29601; bugfix on 0.3.5.4-alpha.

changes/bug29665

-  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.

changes/bug29670

-  o Minor bugfixes (configuration, proxies):
-    - Fix a bug that prevented us from supporting SOCKS5 proxies that want
-      authentication along with configued (but unused!)
-      ClientTransportPlugins. Fixes bug 29670; bugfix on 0.2.6.1-alpha.

changes/bug29703

-  o Minor bugfixes (testing):
-    - Backport the 0.3.4 src/test/test-network.sh to 0.2.9.
-      We need a recent test-network.sh to use new chutney features in CI.
-      Fixes bug 29703; bugfix on 0.2.9.1-alpha.

changes/bug29706_minimal

-  o Minor bugfixes (memory management, testing):
-    - Stop leaking parts of the shared random state in the shared-random unit
-      tests. The previous fix in 29599 was incomplete.
-      Fixes bug 29706; bugfix on 0.2.9.1-alpha.

changes/bug29875

-  o Major bugfixes (bridges):
-    - Do not count previously configured working bridges towards our total of
-      working bridges. Previously, when Tor's list of bridges changed, it
-      would think that the old bridges were still usable, and delay fetching
-      router descriptors for the new ones.  Fixes part of bug 29875; bugfix
-      on 0.3.0.1-alpha.
-    - Consider our directory information to have changed when our list of
-      bridges changes. Previously, Tor would not re-compute the status of its
-      directory information when bridges changed, and therefore would not
-      realize that it was no longer able to build circuits. Fixes part of bug
-      29875.