The argument to the -l flag to text2pcap is a LINKTYPE_ value, not a

The argument to the -l flag to text2pcap is a LINKTYPE_ value, not a
DLT_ value, which is good because it's a numerical value and the
numerical values for some link-layer header types are OS-dependent, but
the numerical values for all LINKTYPE_ values are OS-independent.  Use
LINKTYPE_RAW, not the value for the DLT_RAW on some but not all OSes,
for raw IP.

Also, 7 is LINKTYPE_ARCNET_BSD, emphasis on the "_BSD"; there's also a
Linux encapsulation for ARCNet that is different.  Note that it's the
BSD flavor.

git-svn-id: http://anonsvn.wireshark.org/wireshark/trunk@51005 f5534014-38df-0310-8fa8-9805f1628bb7