Improved backward compatibility with default audit settings

- audit.useNewConfig=false is now the default setting and has a new meaning
- In this mode, audit information is broadcast to BOTH the old and new audit configuration, meaning that e.g. you can enjoy new RM and CMIS auditing capabilities whilst still retaining compatibility with your old audit configuration
- When audit.useNewConfig=true only the new config/alfresco/audit/*.xml configuration will be used exclusively. NOT config/auditConfig.xml.
- Note that auditing is still switched off by default and must be switched on with audit.enabled=true
- You can switch on and off individual applications in the new config using
   - audit.repository.enabled
   - audit.cmischangelog.enabled
   - audit.dod5015.enabled
- Simple!

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@18885 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/audit/AuditComponent.java

@@ -94,6 +94,13 @@ public interface AuditComponent
      * V3.2 from here on.  Put all fixes to the older audit code before this point, please.
      */
 
+    /**
+     * Determines whether audit is globally enabled or disabled.
+     * 
+     * @return <code>true</code>, if audit is enabled
+     */
+    public boolean isAuditEnabled();
+
     /**
      * Determines whether the given source path is mapped to any audit applications. Allows optimizations to be made in
      * calling components.