A modification to reduce the memory usage of the server:

Reduced the initial size of the r->headers_in and r->subprocess_env
tables...this saves us 600 bytes per request, which (based on tests
I just ran) helps keep r->pool from overflowing its initial 8KB
allocation and having to alloc another 8KB block.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@92843 13f79535-47bb-0310-9956-ffa450edef68