Move <browser/> xbl binding out into its own file. Changing extension from xbl to xml. NOT PART OF BUILD.

xpfe/global/resources/content/browserBindings.xml

@@ -12,7 +12,7 @@
    - rights and limitations under the License.
    -
    - The Original Code is this file as it was released on
-   - March 27, 2001.
+   - March 28, 2001.
    -
    - The Initial Developer of the Original Code is Peter Annema.
    - Portions created by Peter Annema are Copyright (C) 2001