backport this from 2.1-dev:

  Don't include newlines in strings passed to ap_log_error.

Reviewed by: geoff, nd


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/APACHE_2_0_BRANCH@103220 13f79535-47bb-0310-9956-ffa450edef68