Revert "Really really turn off netatalk mDNS support"

This reverts commit a2d47cd1dda7bdfc52440d28347be1836cb099e3.
Revert "Disable zeroconf properly for netatalk (helps when you read the port first!)"

This reverts commit 96e580055fa97575f0a0cb23a72495860467bcfb.
Revert "The netatalk mDNS registrtion code is buggy."

This reverts commit 1d0ac388ad59bd70cf11c6111be80d748cf299db.
Revert "Turn off mDNSResponder in netatalk - it's buggy and causes crashes.  Trying"

This reverts commit bde48ea573376fc6d35b71f1df233e1a40d92bd4.