Fix some warnings from lintchanges.

changes/bug14821

   o Major bugfixes (compilation):
     - Correctly repair hardened builds under the clang compiler. Previously,
       our use of _FORTIFY_SOURCE would conflict with clang's address
-      sanitizer. Closes ticket 14821.
+      sanitizer. Fixes bug 14821; bugfix on 0.2.5.4-alpha.

changes/bug17906

   o Minor features (authorities):
-    - Update the V3 identity key for dannenberg, it was changed on
+    - Update the V3 identity key for the dannenberg authority, which changed on
       18 November 2015.
-      Closes task #17906. Patch by "teor".
+      Closes task 17906. Patch by "teor".

changes/bug17923

-  o Minor bugfixes:
+  o Minor bugfixes (portability):
     - Add an #endif to configure.ac so that we correctly detect
       the presence of in6_addr.s6_addr32. Fixes bug 17923; bugfix on
       0.2.0.13-alpha.

changes/bug18050

-  o Minor fixes (relays):
+  o Minor bugfixes (relays):
     - Check that both the ORPort and DirPort (if present) are reachable
       before publishing a relay descriptor. Otherwise, relays publish a
       descriptor with DirPort 0 when the DirPort reachability test takes
       longer than the ORPort reachability test.
-      Closes bug #18050. Reported by "starlight", patch by "teor".
-      Bugfix on 0.1.0.1-rc, commit a1f1fa6ab on 27 Feb 2005.
+      Fixes bug 18050;
+      bugfix on 0.1.0.1-rc.  Reported by "starlight", patch by "teor".

changes/bug18089

-  o Minor fixes (security):
+  o Minor bugfixes (security):
     - Make memwipe() do nothing when passed a NULL pointer
       or zero size. Check size argument to memwipe() for underflow.
-      Closes bug #18089. Reported by "gk", patch by "teor".
-      Bugfix on 0.2.3.25 and 0.2.4.6-alpha (#7352),
-      commit 49dd5ef3 on 7 Nov 2012.
+      Fixes bug 18089; bugfix on 0.2.3.25 and 0.2.4.6-alpha. Reported by "gk", patch by "teor".

changes/bug18162

   o Major bugfixes (security, pointers):
 
     - Avoid a difficult-to-trigger heap corruption attack when extending
-      a smartlist to contain over 16GB of pointers. Fixes bug #18162;
+      a smartlist to contain over 16GB of pointers. Fixes bug 18162;
       bugfix on Tor 0.1.1.11-alpha, which fixed a related bug
       incompletely. Reported by Guido Vranken.
 

changes/geoip-march2016

-  o Minor features:
+  o Minor features (geoip):
     - Update geoip and geoip6 to the March 3 2016 Maxmind GeoLite2
       Country database.