r4469: Version n + 1 of the pidl ethereal parser generator. This version is

r4469: Version n + 1 of the pidl ethereal parser generator.  This version is
based on the idea of manipulating the .c and .h files generated by
parser.pm with perl regexps and glueing it all together to make an
ethereal plugin.

I thought this was a pretty crazy idea to start off with but it has
turned out to be not as complicated as I thought and has the huge advantage
of not duplicating any of the difficult code in parser.pm.