Merge branch 'bug30649_040' into bug30649_maint_041

changes/bug29527

-  o Minor features (circuit padding):
-    - Stop warning about undefined behavior in the probability distribution
-      tests. Float division by zero may technically be undefined behaviour in
-      C, but it's well-defined in IEEE 754. Partial backport of 29298.
-      Closes ticket 29527; bugfix on 0.4.0.1-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/bug29562

-  o Minor bugfixes (pluggable transports):
-    - Fix an assertion failure crash bug when a pluggable transport process is
-      terminated during the bootstrap phase. Fixes bug 29562; bugfix on
-      0.4.0.1-alpha.

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/bug29693

-  o Minor bugfixes (unit tests):
-    - Decrease the false positive rate of stochastic probability distribution
-      tests. Fixes bug 29693; bugfix on 0.4.0.1-alpha.
\ No newline at end of file

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/bug29706_refactor

-  o Minor bugfixes (memory management):
-    - Refactor the shared random state's memory management so that it actually
-      takes ownership of the shared random value pointers.
-      Fixes bug 29706; bugfix on 0.2.9.1-alpha.

changes/bug29874

-  o Minor bugfixes (pluggable transports):
-    - Restore old behaviour when it comes to discovering the path of a given
-      Pluggable Transport exe-file. Fixes bug 29874; bugfix on 0.4.0.1-alpha.
-

changes/bug29922

-  o Minor bugfixes (testing, windows):
-    - Fix a test failure caused by an unexpected bug warning in
-      our test for tor_gmtime_r(-1). Fixes bug 29922;
-      bugfix on 0.2.9.3-alpha.

changes/bug29930

-  o Minor bugfixes (UI):
-    - Lower log level of unlink() errors during bootstrap. Fixes bug 29930;
-      bugfix on 0.4.0.1-alpha.
-

changes/bug29959-040

-  o Minor bugfixes (directory authorities):
-    - Actually include the bandwidth-file-digest line in directory authority
-      votes. Fixes bug 29959; bugfix on 0.4.0.2-alpha.

changes/bug30001

-  o Minor features (testing):
-    - Use the approx_time() function when setting the "Expires" header
-      in directory replies, to make them more testable. Needed for
-      ticket 30001.
-  o Minor bug fixes (testing):
-    - Check the time in the "Expires" header with approx_time().
-      Fixes bug 30001; bugfix on 0.4.0.4-rc.

changes/bug30011

-  o Minor bugfixes (CI):
-    - Terminate test-stem if it takes more than 9.5 minutes to run.
-      (Travis terminates the job after 10 minutes of no output.)
-      Diagnostic for 29437. Fixes bug 30011; bugfix on 0.3.5.4-alpha.

changes/bug30021

-  o Minor bugfixes (TLS protocol, integration tests):
-    - When classifying a client's selection of TLS ciphers, if the client
-      ciphers are not yet available, do not cache the result. Previously,
-      we had cached the unavailability of the cipher list and never looked
-      again, which in turn led us to assume that the client only supported
-      the ancient V1 link protocol.  This, in turn, was causing Stem
-      integration tests to stall in some cases.
-      Fixes bug 30021; bugfix on 0.2.4.8-alpha.

changes/bug30040

-  o Minor bugfixes (security):
-    - Fix a potential double free bug when reading huge bandwidth files. The
-      issue is not exploitable in the current Tor network because the
-      vulnerable code is only reached when directory authorities read bandwidth
-      files, but bandwidth files come from a trusted source (usually the
-      authorities themselves). Furthermore, the issue is only exploitable in
-      rare (non-POSIX) 32-bit architectures which are not used by any of the
-      current authorities. Fixes bug 30040; bugfix on 0.3.5.1-alpha. Bug found
-      and fixed by Tobias Stoeckmann.

changes/bug30041

-  o Minor bugfixes (hardening):
-    - Verify in more places that we are not about to create a buffer
-      with more than INT_MAX bytes, to avoid possible OOB access in the event
-      of bugs.  Fixes bug 30041; bugfix on 0.2.0.16.  Found and fixed by
-      Tobias Stoeckmann.

changes/bug30189

-  o Minor bugfixes (compilation, unusual configuration):
-    - Avoid failures when building with ALL_BUGS_ARE_FAILED due to
-      missing declarations of abort(), and prevent other such failures
-      in the future. Fixes bug 30189; bugfix on 0.3.4.1-alpha.