Two problems were introduced by the two "error responses have wrong headers"

patches committed a couple weeks ago.  The first is that a NULL table
causes mod_log_config to SIGSEGV on a call to table_get; the second is
that Location needs to be added to the output header table for redirects.

Submitted by: Roy Fielding and Ed Korthof
Reviewed by: Jim Jagielski, Randy Terbush


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@78166 13f79535-47bb-0310-9956-ffa450edef68