GUAC-1132: Add identifier to connection records.

guacamole-ext/src/main/java/org/glyptodon/guacamole/net/auth/ConnectionRecord.java

@@ -33,6 +33,16 @@ import org.glyptodon.guacamole.net.GuacamoleSocket;
  */
 public interface ConnectionRecord {
 
+    /**
+     * Returns the identifier of the connection associated with this connection
+     * record.
+     *
+     * @return
+     *     The identifier of the connection associated with this connection
+     *     record.
+     */
+    public String getIdentifier();
+    
     /**
      * Returns the date and time the connection began.
      *