1) fix some problems with the SINEC H1 dissector;
2) make it easier to plug in other dissectors atop OSI transport
protocols (by making the H1 dissector return an indication of
whether it recognizes the packet as an H1 packet or not, so
that, if it doesn't, additional dissectors can be tried).
svn path=/trunk/; revision=1895
Ethernet; used for communication with Siemens S5 PLC's over Ethernet),
and his changes to display OSI COTP TSAPs that consist solely of
printable characters as text rather than as hex data and to decode the
version number resource in COTP.
svn path=/trunk/; revision=1677