(I think I forgot to attach the ebuild last time...oh well)

I split it up into the main libs, the mysql plugin and the pgsql plugin. 
The DB-version dependancies are based on the current mysql and pgsql
versions in portage, but I dont know what the minimums really are (I suppose
it dosent matter anyways).

For the plugins, I asumed libdbi would be put in dev-libs/libdbi, so those
lines will need to be changed if it is put somewhere else.

I didnt test the postgres plugin because I dont have postgres installed, but
there were only a few lines to change so it should be fine.

-Tom