Merge r1834470 from trunk:

Render <code> in bold in man pages, matching commonly used style in
both help2man and the standard DocBook XSL stylesheets for man output.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1835219 13f79535-47bb-0310-9956-ffa450edef68