This should fix the remaining problems with POST. Basically, we

add a new macro, called APR_BRIGADE_NORMALIZE.  This macro searches
all the buckets, and removes any zero length bucket.  They we can
just use APR_BRIGADE_EMPTY to determine if our brigade has any data,
and we can quickly call ap_get_brigade if it doesn't.

Doug, please throw your battery of tests at this to make sure it works.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@90070 13f79535-47bb-0310-9956-ffa450edef68