qmail fixups and new howto

Following my previous post about new qmail ebuilds, i have started a clean install for one of our mail servers at work and already fixed some bugs, mainly in the webapp integration for vqadmin and the dovecot-dspam plugin that has been added to portage recently. Again, these updated ebuilds can be found in my overlay.

During the installation i have also rewritten most parts of the old netqmail/vpopmail guide. It now uses dovecot instead of courier, has a section aboult spam filtering with RBL, ClamAV, DSpam and SpamAssassin and explains howto setup vqadmin/qmailadmin.

The first draft of the qmail guide can be found here.