Add a space when specifying the port to a datagram session

datagram.go

@@ -60,7 +60,7 @@ func (s *SAM) NewDatagramSession(id string, keys i2pkeys.I2PKeys, options []stri
 		s.Close()
 		return nil, err
 	}
-	conn, err := s.newGenericSession("DATAGRAM", id, keys, options, []string{"PORT=" + lport})
+	conn, err := s.newGenericSession("DATAGRAM", id, keys, options, []string{" PORT=" + lport})
 	if err != nil {
 		return nil, err
 	}