[doc] Horde Docs

[Van Howell]

I am attempting to install Horde and IMP on a mail server running EXIM
and Qpopper. Both my Exim and Qpopper installs use only virtual users
stored in a MySQL database. This should be an interesting implementation
of IMP, and I will gladly document my setup when and if I get it
working. However at this point I cannot even get Horde to see my Horde
database. I would like any Horde Docs that you have. I cannot get the
thing configured.
Thanks