print-atm.c no longer performs special handling for FORE headers; these
can no doubt be re-added at a later date.
print-fr.c is effectively a no-op.
print-llc.c has had the default_print_unaligned() call removed as
tcpdump no longer defines this function, however the prototype is still
present. Suggest we roll in a diff to use print_unknown_data().
Always display IPX network number in decimal (industry standard).
Decode other PPP protocol types too.
Submitted by: peter, pst, John Hay <jhay@mikom.csir.co.za>
