protocol: invalid_method is sent on invalid arguments

Currently libwayland sends a wl_display.invalid_method when arguments provided
with a request are invalid (e.g. too short, see wl_client_connection_data).

Clarify the protocol by adding that invalid_method can be sent on invalid
arguments.

Signed-off-by: Simon Ser <contact@emersion.fr>
1 job for protocol-invalid-method in 1 minute and 38 seconds (queued for 30 seconds)
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passed #414929
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00:01:38