[sork] sork - vpopmail

[sork@stean.ch]

Hello everybody,

perhaps I made some work which was already made before,
but just to mention. As I am using horde/imp with qmail/vpopmail
there is no good way to setup a poppassd so I extended sork
on my own to work with vpopmail.

Quite not completly tested yet, but it is working and used by my users, I think
that the idea of having other backends than those used by the sork modules
right now should be taken as extension into the next releases.

Regards, stean