Port 0.2.9.10 changelog and releasenotes to master

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 Changes in version 0.3.0.4-??? - 2017-02-??
 
 
+Changes in version 0.2.9.10 - 2017-03-01
+  Tor 0.2.9.10 backports a security fix from later Tor release.  It also
+  includes fixes for some major issues affecting directory authorities,
+  LibreSSL compatibility, and IPv6 correctness.
+
+  The Tor 0.2.9.x release series is now marked as a long-term-support
+  series.  We intend to backport security fixes to 0.2.9.x until at
+  least January of 2020.
+
+  o Major bugfixes (directory authority, 0.3.0.3-alpha):
+    - During voting, when marking a relay as a probable sybil, do not
+      clear its BadExit flag: sybils can still be bad in other ways
+      too. (We still clear the other flags.) Fixes bug 21108; bugfix
+      on 0.2.0.13-alpha.
+
+  o Major bugfixes (IPv6 Exits, backport from 0.3.0.3-alpha):
+    - Stop rejecting all IPv6 traffic on Exits whose exit policy rejects
+      any IPv6 addresses. Instead, only reject a port over IPv6 if the
+      exit policy rejects that port on more than an IPv6 /16 of
+      addresses. This bug was made worse by 17027 in 0.2.8.1-alpha,
+      which rejected a relay's own IPv6 address by default. Fixes bug
+      21357; bugfix on commit 004f3f4e53 in 0.2.4.7-alpha.
+
+  o Major bugfixes (parsing, also in 0.3.0.4-rc):
+    - Fix an integer underflow bug when comparing malformed Tor
+      versions. This bug could crash Tor when built with
+      --enable-expensive-hardening, or on Tor 0.2.9.1-alpha through Tor
+      0.2.9.8, which were built with -ftrapv by default. In other cases
+      it was harmless. Part of TROVE-2017-001. Fixes bug 21278; bugfix
+      on 0.0.8pre1. Found by OSS-Fuzz.
+
+  o Minor features (directory authorities, also in 0.3.0.4-rc):
+    - Directory authorities now reject descriptors that claim to be
+      malformed versions of Tor. Helps prevent exploitation of
+      bug 21278.
+    - Reject version numbers with components that exceed INT32_MAX.
+      Otherwise 32-bit and 64-bit platforms would behave inconsistently.
+      Fixes bug 21450; bugfix on 0.0.8pre1.
+
+  o Minor features (geoip):
+    - Update geoip and geoip6 to the February 8 2017 Maxmind GeoLite2
+      Country database.
+
+  o Minor features (portability, compilation, backport from 0.3.0.3-alpha):
+    - Autoconf now checks to determine if OpenSSL structures are opaque,
+      instead of explicitly checking for OpenSSL version numbers. Part
+      of ticket 21359.
+    - Support building with recent LibreSSL code that uses opaque
+      structures. Closes ticket 21359.
+
+  o Minor bugfixes (code correctness, also in 0.3.0.4-rc):
+    - Repair a couple of (unreachable or harmless) cases of the risky
+      comparison-by-subtraction pattern that caused bug 21278.
+
+  o Minor bugfixes (tor-resolve, backport from 0.3.0.3-alpha):
+    - The tor-resolve command line tool now rejects hostnames over 255
+      characters in length. Previously, it would silently truncate them,
+      which could lead to bugs. Fixes bug 21280; bugfix on 0.0.9pre5.
+      Patch by "junglefowl".
+
+
 Changes in version 0.3.0.3-alpha - 2017-02-03
   Tor 0.3.0.3-alpha fixes a few significant bugs introduced over the
   0.3.0.x development series, including some that could cause