Included two new SSI-vars to correct the internationalized

error-response behaviours. CHARACTER_ENCODING, CONTENT_LANGUAGE.

Submitted by: Hiroaki Kawai <hawk@bcl.t.u-tokyo.ac.jp>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@96519 13f79535-47bb-0310-9956-ffa450edef68