HTTP tests fail on OS X

I've bisected it to this commit:

commit 0442743810c6f6c14386a5a9d6bf8e4d69adbc51
Author: Jeff King [off-list ref]
Date:   Sun Jun 9 04:07:59 2013 -0400

    t/lib-httpd/apache.conf: do not use LockFile in apache >= 2.4

OS X 10.8.4, apache 2.2.22

I'll also note that the tests fail the first time they attempt to access the server and the cleanup function notes that httpd is not running under the expected PID.  Looking at the httpd setup code, I would have expected to see errors (with -v) and have the setup fail but neither happens.

It's way too late for me, so I can't look at it again for at least several hours.  I figured I'd ping the list in case the problem/solution is obvious to someone else.

~~ Brian Gernhardt