Up until now debug builds would always wait up to 500 ms during initialization
to give time for debuggers to attach to the game.
We no longer want this as it increases startup time unnecesarily.
The way forward is to setup the debugger agent as client instead of server.
This way it's the game that connect to the debugger, not the other way around.
If server mode is still desired, suspend=y can be used to indefinitely wait
for the debugger to attach. This all can be specified with the environment
variable 'GODOT_MONO_DEBUGGER_AGENT' when launching the game.
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