Fix a bug in our output filter buffering. If a lot of small brigades are

sent, the core will send the first 16 buckets, regardless of how much
data there is.  In the pathological case, this can cause a lot of 16
byte packets.  Now, if we see less than AP_MIN_BYTES, we combine
all of the buckets into a single bucket to be sent in a later packet.

This can cause a lot of memory copies, but it eases our network traffic.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@92097 13f79535-47bb-0310-9956-ffa450edef68