AbstractCvsScmProvider.parseScmUrl for ext transport should expect 4 or 5 tokens

According to http://maven.apache.org/scm/cvs.html ext transport url may contain 4 or 5 (including port) tokens (excluding the first two tokens 'scm' and 'cvs' that are consumed before)

scm:cvs<delimiter>ext<delimiter>[username@]servername[<delimiter>port]<delimiter>path_to_repository<delimiter>module_name

but the code inside AbstractCvsScmProvider.parseScmUrl

if ( tokens.length != 4 && transport.equalsIgnoreCase( TRANSPORT_EXT ) )
            {
                result.getMessages().add( "The connection string contains too few tokens." );

                return result;
            }

requires 4 tokens and adds misleading message.