public static String getLocalDomainVerHash() {
        return getLocalDomainVerHash(null);
    }
Returns the 'ver' hash for this server, returning capabilities that are available to anyone (including anonymous
users)

@return A 'ver' hash, or null if none could be generated.
xmppserver/src/main/java/org/jivesoftware/openfire/entitycaps/EntityCapabilitiesManager.java