put it into a subroutine in "packet-arp.c", and call it from
"packet-q2931.c".
Add a "packet-arp.h" header to hold declarations of routines exported by
"packet-atm.c" (other than the ATM dissector itself), moving them out of
"packet.h".
Use the aforementioned NSAP dissector to display ATM addresses in NSAP
format, and display E.164 addresses as ASCII text (under the assumption
that they're presented as a string of IA5, i.e. ASCII, characters, just
as they are in Q.931).
svn path=/trunk/; revision=1124