* Net::XMPP2 missing functionality to be RFC 3920 conform:
   - add timeouts to IQs!
   - improve error handling for SASL to 
     support retries as specified in RFC 3920.
     (eg. by supporting a method sasl_retry() which takes
      the changed credentials)
   - SRV record lookup
      - weight handling!
   - test Net::XMPP2::Error: bind_error and stream_error.
   - in band registration and un-registration!!!
      - finish in-band-registration XEP
   later:
      - make dns resolution async!
      - make extensions more optional and reentrant

* Net::XMPP2::IM missing functionality to be RFC 3921 conform:
   - message and presence
      - handle subscriptions
   - 7.2.  Business Rules

* Implement XEP-0004: Data Forms
   - see also: XEP-0068: Field Standardization for Data Forms

* Implement XEP-0082: XMPP Date and Time Profiles
   - util functions to convert them to unix timestamps

* Implement XEP-0030: Service Discovery
   - see also: XEP-0128: Service Discovery Extensions

* Implement XEP-0115: Entity Capabilities

* Implement XEP-0045: Multi-User Chat
   - think about: make seperate MUC handler class

* keep an eye on:
   - TLS: implemented, just do some extensive testing WRT blocking,
          i don't trust the current way the watchers are handled,
          i'm in fear of deadlocks...