TODO for mod_jserv in the 0.9.x branch:

- Implement correct behavior when exception UnavailableException is thrown 
  from a servlet.

- Implement correct behavior when servicing servlet that implements 
  SingleThreadModel

- All messages logged after the headers are sent, will only be log with
  the next request to the servlet. (AJPv2 protocol will address this.)

- Find a way to callback apache to handle things like filename/mime-type
  mapping and file path resolution. (AJPv2 protocol will address this.)
 
- Improve timeout control on servlet methods to prevent deadlocking JServ. 
  For example, if a servlet deadlocks, JServ won't be able to restart and most
  request to the servlet will never be able to complete.

