INT 21 - LANtastic - LOGOUT FROM SERVER                                         
	AX = 5F82h
	ES:DI -> ASCIZA NUL-terminated ASCII string.	The ASCIZ string "ABC" consists of the four bytes 41h, 42h, 43h, and 00h.  Unless otherwise specified, maximum lengths given in the interrupt list do not include the terminating NUL. server name (in form "\\machine")
Return: CF clear if successful
	CF set on error
	    AX = error code
SeeAlso: AX=5F81h,AX=5F88h,AX=5FCBh