patch: add a plugin to write new files to specific networks

[dormando]

Thank you!

If no one else gets to it first, I'll have time to properly review them 
this weekend.

-Dormando

Andy McFarland wrote:
> As promised!
> 
> Attached is another patch against r1127, this one adds a new server
> plugin which changes the behaviour of cmd_create_open.  You can
> configure server settings (more!) so that when a new file is written to
> mogile, it will first go to specific networks.  Details in the POD.
> 
> This patch doesn't duplicate any of my previous 2, so if you want
> everything, you'd best apply all three.
> 
> cheers.
> 
>