XWin does not erase lock file when exiting

[Rodrigo Medina]

Dear Sirs,
When XWin regularly exits, it removes the socket in /tmp/.X11-unix/ and closes
the XWin.?.log file, but it does not erase the file
/tmp/.X11-unix/X?.lock. This file is
owned by the  user and him alone can erase it. The same user can start
XWin again, but another user cannot start XWin. Very annoying
situation when different
users work on the same machine. This problem was not present in the
previous release I was using.
Rodrigo Medina