#21 ignore parsing fails

[John Dalbec]

The parsing logic for "ignore" statements doesn't work.
I get "parse error" messages in the syslog and the
packets are not ignored. I "fixed" it by telling
tokenize to look for only two arguments and removing
the conditional parsing of the optional (and ignored?)
middle argument. I presume your intention was to allow
a middle argument so that you could easily convert
"accept" to "ignore" and vice versa. Or is the middle
argument the amount of time the matching packets stay
in the queue for display purposes?