Add 'export' mode to who command.
partially catch up help files to changes by csf@moscow.com
(changed default access for info/intro/faq, new variables available)
(list_access_check) Require use of the master password in
conjunction with regular expressions (with the unregister
and unsubscribe commands).
add new -regexp option to unregister, improve comments about
passwords/tokens/-allmatching in related files
(_showtokens) Sort tokens by date, from oldest to newest.
fix typos related to -regexp and password approval
(list_access_check)  Use the action without the argument
when calling action_terminal().
(which) Obtain correct hit count.
Make "limit exceeded" message more readable.
clarify limits on how many addresses the "which" command will return
fix unclear wording about registering and getting a password to pre-approve unsub commands
Pull bounce handling out of owner_done and into a separate function.
Note whether bouncing user is a list member or not.
More work on who-export mode.
Rewrite class/flag setting internals.
who-export bug fix.
Add NOTIFY to substitution hash for replies to actions
that may require confirmation.
new -export option for "who" (dumps list) and "set" now accepts multiple flags
Improved bounce parsing: try harder to get diagnostics.
who-export now handles expiring nomail, including restoring the original
class.
Added program to exercise bounce parser.
Added FakeLog module; provides all Mj::Log functionality, but doesn't
do anything.
Reset $ok before calling dispatch().
Clarify and extend descriptive text and formatting.
Explain the causes of an "Invalid password" error.