INT 21 U - DOS 3.1+ network - FLUSH REDIRECTED PRINTER OUTPUT
        AX = 5D09h
Notes:  forces redirected printer output to be printed, and starts a new print
          job
        this function is also supported by 10Net, which calls it Terminate All
          Spool Jobs, and does not flush if in "combine" mode
SeeAlso: AX=5D07h,AX=5D08h,INT 2F/AX=1125h

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