Tweak changes entry for 6799

changes/bug6799

@@ -1,8 +1,8 @@
   o Major features:
 
     - Increase the base amount of time that a canonical connection
-      (one that we have made to a known OR) is allowed to stay open
-      from a 3 minutes to 15 minutes.  This leaks less information
+      (one that we have made to a known OR) is allowed to stay idle
+      from 3 minutes to 15 minutes.  This leaks less information
       about when circuits have closed, and avoids unnecessary overhead
       from renegotiating connections. Part of a fix for ticket 6799.
 
@@ -14,7 +14,7 @@
 
     - Base connection idleness tests on the actual time elapsed since
       the connection last had circuits, not on the time when we last
-      added non-padding. This also makes it harder to tell when the last
-      circuit closed by looking at when a connection closes. Part of a
-      fix for ticket 6799.
+      added non-padding. This change also makes it harder for an
+      observer to tell when the last circuit closed by looking at when
+      a connection closes. Part of a fix for ticket 6799.
       Incidentally fixes bug 12023; bugfix on 0.2.5.1-alpha.