INT 21 U - Novell NetWare - SET SIGNATURE LEVEL                                 
	AX = B304h
	BX:CX = new signature level (see AX=B301h)
Return: ???
Note:	this function appeared with the packet signing/Large Internet Packets/
	  IPX(Internetwork Packet Exchange) A low-level layer of Novell's NetWare networking software. Checksum-aware NetWare shells
SeeAlso: AX=B300h,AX=B301h,AX=B306h,#02875