INT 61 - PC/TCP kernel v2.05+ - "net_releaseall" - CLOSE ALL NON-GLOBAL DESCRS
        AH = 09h
Return: CF clear
Notes:  this call performs function 08h on every non-global network descriptor.
          Global descriptors must be released individually.
        INT 61 is the default; PC/TCP v2.05 may be configured to use any
          interrupt from 20h through E0h
SeeAlso: INT 61"PC/TCP",INT 61/AH=00h"PC/TCP",INT 61/AH=08h"PC/TCP"
SeeAlso: INT 63/AH=0Eh"BW-TCP"

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