TODO:
----

Config file
   + User (per-user access controls)

User = username:umask:access:chrootpath

   username: user's username as it appears on the system (uid?)
   umask: set the session umask for that user
   access: series of binary digits indicating access
	000
	|||
	||\ allow scp for this user
	|\ allow sftp for this user
	\ chroot the user to the chroot path specified in the user's entry
   chrootpath: path where the user should be chrooted to
