INT 61 - Banyan VINES - "Soclose" - CLOSE A SOCKET
	AX = 0001h subfn 0004h
	DS:DX -> communications control block (function 0004h) (see #03337)
Return: AX = status (0000h-000Ah,0097h) (see #03325)
Range:	INT 60h to INT 66h
Note:	The Banyan interrupt handler is identified by the string "BANV" in
	  the four bytes immediately preceding the interrupt handler
SeeAlso: AX=0001h/SF=0001h,INT 15/AX=DE2Eh


Format of VINES control block to close socket:
Offset	Size	Description	(Table 03337)
 00h	WORD	0004h
 02h	WORD	pointer to argument block (see #03338)
 04h	WORD	error return code (see #03325)
 06h  4 BYTEs	reserved
SeeAlso: #03334,#03340


Format of VINES argument block for closing socket:
Offset	Size	Description	(Table 03338)
 00h	WORD	socket identifier
SeeAlso: #03335,#03337,#03341