http_filter():

  when delivering body bytes, only deliver one block of data (however
  much is returned by bucket read) instead of delivering the entire
  body at once; this gets painful with a large body

  make a note of an issue with the blocking state of the socket;
  currently, the socket is non-blocking, but when reading body bytes
  we should feel free to wait for body bytes until a timeout occurs;


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@86628 13f79535-47bb-0310-9956-ffa450edef68