public String getVersionString() {
        if ( major > 0 ) {
            return major + "." + minor;
        } else {
            return String.valueOf( minor );
        }
    }
Returns the version number of this instance of Openfire as a
String (ie major.minor.revision).

@return The version as a string
xmppserver/src/main/java/org/jivesoftware/util/JavaSpecVersion.java