Proposed change of convoi behaviour when all destinations are overcrowded

[prissi]

Currently, such a convoi will wait infinitively, getting the game to a standstill.

My suggestion is the reverse: When all destinations in a schedule are overcrowded, then the loading limit is ignored and the convoi leaves immediately.

[Andarix]

This will probably have the effect that the loading limit was intended to prevent. Namely, unnecessary empty journeys that can cause high costs.

I tend to prefer a message that cannot be switched off and that points this out.