PR62186: preserve %<m for ErrorDocument internal redirects

  *) core: Preserve the original HTTP request method in the '%<m' LogFormat
     when an path-based ErrorDocument is used.  PR 62186.
     [Micha Lenk <micha lenk.info>]

Submitted By: Micha Lenk
Committed By: covener


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1828920 13f79535-47bb-0310-9956-ffa450edef68