Fix-ups for dynamic OpenSSL engine patch.

Include a changelog, and don't try to compare strings with !=.

ChangeLog

@@ -1,5 +1,9 @@
 Changes in version 0.2.2.1-alpha - 2009-??-??
-  o Minor features
+  o Major features:
+    - Add support for dynamic OpenSSL hardware crypto acceleration engines
+      via new AccelName and AccelDir options.
+
+  o Minor features:
     - New --digests command-line switch to output the digests of the
       source files Tor was built with.
     - The "torify" script now uses torsocks where available.

src/or/config.c

@@ -3671,8 +3671,8 @@ options_transition_allowed(or_options_t *old, or_options_t *new_val,
   }
 
   if ((old->HardwareAccel != new_val->HardwareAccel)
-      || (old->AccelName != new_val->AccelName)
-      || (old->AccelDir != new_val->AccelDir)) {
+      || !opt_streq(old->AccelName, new_val->AccelName)
+      || !opt_streq(old->AccelDir, new_val->AccelDir)) {
     *msg = tor_strdup("While Tor is running, changing OpenSSL hardware "
                       "acceleration engine is not allowed.");
     return -1;