This is all you need to know. Connect all parport data pins together and connect it to suitable relay. Preferably 3-pin relay, so the Wifi-power-on is the default state.
$ cat wifi-off
#! /usr/bin/python2
import parallel,time
p = parallel.Parallel() # open LPT1 or /dev/parport0
p.setData(0xFF)
$ cat wifi-on
#! /usr/bin/python2
import parallel,time
p = parallel.Parallel() # open LPT1 or /dev/parport0
p.setData(0x0)
