Fix stderr redirection under syslog-based error logging situation.

PS: This is actually an extracted sub-patch of a large patch which contains
    lots of style changes, too. The style changes I'll commit in a second
    round (I don't want to commit the stuff mixed together). Only one change
    (2->STDERR_FILENO) is committed also now, because it's more like a bugfix.

Submitted by: Youichirou Koga <y-koga@jp.FreeBSD.org>
PR: 3095


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@82206 13f79535-47bb-0310-9956-ffa450edef68