From v0.03, we attempt to be namespace clean.
Reserved namespaces are:

	____menuet : C runtime and linkage system. Low-level System call
		functions.

	_msys_ : High-level System call functions and a few miscellaneous
		support functions e.g. _msys_GetAppHeader

	__menuet_emu
	__menuet_emusys : Host Emulation functions and variables.

