Stop using the index into the array for the bucket type. Now we just use

a pointer to a static structure.  The ap_foo_type functions have also been
replaced with simple macro calls.  I am going to replace the
ap_bucket_(read|split|setaside|destroy) functions with macros soon.
Reviewed by:	Will Rowe


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@86597 13f79535-47bb-0310-9956-ffa450edef68