How to temporarily disable local forwards

I have in my ~/.ssh/config file entries with local forward definitions like

HOST myServer
   hostname 10.10.0.1
   user xyz
   LocalForward 8080 localhost:80
   LocalForward 4000 127.0.0.1:4000
   ...

This works like a charm, but I also have scripts to synchronize some data.
These scripts show many warnings when they try to connect to the server while there is already a connection.

bind: Address already in use
channel_setup_fwd_listener_tcpip: cannot listen to port: 8080
bind: Address already in use
channel_setup_fwd_listener_tcpip: cannot listen to port: 4000
....

Is there a neat way to use ssh or rsync with an option to disable all local forwards for a session?

Obviously I could copy&paste each config block and build one with and one without local forwards, but I hope there is a better solution.

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