Provide Internet Archive links for dead URLs.
Update to note that PSML output is supported by tshark and not
a future feature (true since 17 years ago, when it was still tethereal).
Note "fake-field-wrapper" protocol for top level fields (including data,
which is converted from a protocol to a field for PDML).
Note "_ws.expert" protocol replaced by field, as with data.
Note that some dissectors place subdissected protocols in subtrees
instead of at the top level, and that this is _not_ changed, violating
the PDML spec.
Fix #10588.