Next (in order of descending priority/precedence):

* Fix proxy to recognize response codes from the backend and forward
  them to the user if appropriate/safe.
* Implement new capabilities
	- MAXREDIRECTS capability
* Implement new script name rules
* Implement the HAVESPACE command properly. Currently it always says ok.
  Maybe this should be linked to the mail quota system. 
* Enforce protocol syntax better with some of the commands. Some 
  commands still allow spurious extra arguments
  --> Full protocol syntax conformance review. 
* Implement proper support for anonymous login.
* Make the sieve storage a base class with (possibly) various
  implementations, just like mail-storage. Currently not very useful. 

* Thorough testing...
  - Test pipelined behavior
  - Test proxy authentication

* Resolve exessive code duplication
	- Between imap and managesieve (Timo?)
	- Between managesieve and managesieve-login
* Create proper process interface to dovecot for generic non-mail protocols 
  (Timo).
