fix an old misfeature: "BufferedLogs Off" would sort-of turn

buffered logging on as it set the log writer to the buffered log
writer, though it would leave the are-logs-buffered flag off

this misfeature combined with recent mutex logic for buffered logs
led to a segfault with "BufferedLogs Off"


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@102783 13f79535-47bb-0310-9956-ffa450edef68