Merge branch 'maint-0.2.1' into release-0.2.1

changes/abandon-rend-circs-on-newnym

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+  o Security fixes:
+    - Don't attach new streams to old rendezvous circuits after SIGNAL
+      NEWNYM.  Previously, we would keep using an existing rendezvous
+      circuit if it remained open (i.e. if it were kept open by a
+      long-lived stream or if a new stream were attached to it before
+      Tor could notice that it was old and no longer in use and close
+      it).  Bugfix on 0.1.1.15-rc; fixes bug 3375.
+

changes/bug2574

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+  o Minor features:
+    - Allow nameservers with IPv6 address. Fixes bug 2574.
+

changes/bug4014

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+  o Minor features:
+    - Adjust the expiration time on our SSL session certificates to
+      better match SSL certs seen in the wild. Resolves ticket 4014.

changes/cid_428

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+  o Minor bugfixes:
+    - Always NUL-terminate the sun_path field of a sockaddr_un before
+      passing it to the kernel. (Not a security issue: kernels are
+      smart enough to reject bad sockaddr_uns.) Found by Coverity; CID
+      # 428. Bugfix on Tor 0.2.0.3-alpha.

changes/cid_450

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+  o Minor bugfixes:
+    - Don't stack-allocate the list of supplementary GIDs when we're
+      about to log them. Stack-allocating NGROUPS_MAX gid_t elements
+      could take up to 256K, which is way too much stack.  Found by
+      Coverity; CID #450. Bugfix on 0.2.1.7-alpha.

changes/geoip-august2011

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+  o Minor features:
+    - Update to the August 2 2011 Maxmind GeoLite Country database.
+

changes/geoip-july2011

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+  o Minor features:
+    - Update to the July 1 2011 Maxmind GeoLite Country database.
+

changes/geoip-june2011

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+  o Minor features:
+    - Update to the June 1 2011 Maxmind GeoLite Country database.
+

changes/geoip-october2011

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+  o Minor features:
+    - Update to the October 4 2011 Maxmind GeoLite Country database.
+

changes/geoip-september2011

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+  o Minor features:
+    - Update to the September 6 2011 Maxmind GeoLite Country database.
+