adding caldav/carddav next to dovecot

[Marc]

> 
> > I have seen that one, don't you think that the performance difference
> between an interpreted language vs compiled language comes into play
> with 10k users?
> 
> i'm sure it does.
> 
> and that's a subjective decision about an objective measure.
> 
> i've ~ 2K users, with radicale running alongside dovecot/fts-

If I may ask, how many requests per second are these 2k users generate? I have currently created some script in bash to do caldav puts/gets. But I seem to be hitting the limits of the script, and I do not know of any tool that can alter and put content.