Apache Reference: http_core, LockFile
Path to Lock File for Serialized Connection Accepts
Syntax: LockFile A
Example: LockFile /var/run/apache.lock
Since: Apache 1.2
The path is used when the server needs to lock the accept(2)
call. This directive should normally be left at its default
value. It might be changed if the log's directory
is NFS-mounted, as the lock file must be stored on a local
disk. The PID of the main server process is automatically
appended to the file name. For security reason, you should avoid
putting this file in a world-writable directory, such as
F, because someone could launch a denial-of-service
attack and prevent the server from starting by creating a
lock file with the same name as the one the server will try to
create.