ap_get_mime_headers_core: allocate space for the trailing null when there

      are folded headers. PR 18170 [Peter Mayne <PeterMayne@SPAM_SUX.ap.spherion.com>]


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@99057 13f79535-47bb-0310-9956-ffa450edef68