TC 3.3 Mod_jk chunked input encoding

[Keith Wannamaker]

This patch enables chunked input through mod_jk:
http://www.apache.org/~keith/jk/

I think they are rather minor changes.

Please review, discuss, and throw everything you have
at it.  If Larry approves I will commit this (or an
approved version) to tc 3.3.  In addition, I would port 
it to the apache-2.0 jk module in tc 3.3, as well as
forward port it to j-t-c.

Keith