merge this from 2.1-dev:

  EBCDIC: Convert header fields to ASCII before sending (broken
  since 2.0.44).

Submitted by: Martin Kraemer
Reviewed by:  trawick, nd, gregames


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/APACHE_2_0_BRANCH@101818 13f79535-47bb-0310-9956-ffa450edef68