Fix a bug codec preferences with equal priorities are ignored. Fix some system bundles.

src/net/java/sip/communicator/impl/neomedia/codec/EncodingConfiguration.java

@@ -522,6 +522,13 @@ private int compareEncodingPreferences(MediaFormat enc1, MediaFormat enc2)
         Integer pref2 = encodingPreferences.get(enc2);
         int pref2IntValue = (pref2 == null) ? 0 : pref2;
 
-        return pref2IntValue - pref1IntValue;
+        int res = pref2IntValue - pref1IntValue;
+
+        // if the encodings are with same priority
+        // compare them by name, if we return equals TreeSet wont add
+        // equal encodings
+        if(res == 0)
+            return enc1.getEncoding().compareTo(enc2.getEncoding());
+        return res;
     }
 }

src/net/java/sip/communicator/plugin/facebookaccregwizz/facebookaccregwizz.manifest.mf

@@ -3,6 +3,7 @@ Bundle-Name: Facebook account registration wizard
 Bundle-Description: Facebook account registration wizard.
 Bundle-Vendor: sip-communicator.org
 Bundle-Version: 0.0.1
+System-Bundle: yes
 Import-Package: org.osgi.framework,
  net.java.sip.communicator.service.browserlauncher,
  net.java.sip.communicator.service.configuration,

src/net/java/sip/communicator/plugin/globalproxyconfig/globalproxyconfig.manifest.mf

@@ -3,6 +3,7 @@ Bundle-Name: Global Proxy Config Plugin
 Bundle-Description: A plugin to configure global proxy for sip communicator
 Bundle-Vendor: sip-communicator.org
 Bundle-Version: 0.0.1
+System-Bundle: yes
 Import-Package: org.osgi.framework,
  net.java.sip.communicator.util,
  net.java.sip.communicator.util.swing,