[spambayes-dev] pop3proxy/imapfilter advanced configuration page

[Tony Meyer]

I've just checked in an update to the web interface for pop3proxy/imapfilter
that provides an "Advanced Configuration" page (there's a button at the
bottom of the regular config page).

This was requested (#791254), but it seemed to make sense to me that some
people might want to play around with advanced options, but not want to have
to understand how to edit the config file by hand (and there's also the need
to use Python to get a list of the options available).

I tried to choose options that seemed too advanced to go on the regular
config page (and I moved a couple from there), but none that are simply too
complicated for people to use unless they know what they are doing.  If
anyone thinks I've included something that I shouldn't have, or have missed
an option that I should have included, please let me know.

Any comments welcome.

=Tony Meyer