Lock file while in use

[Andrés Chandía]

Hi again after so long,
Once, Liviu had implemented for the University I work at the locking of the file in use in a way that always that the file is opened by a user a second user (at a network) can open it also but only in "read only" mode, so the file can not be modified while another user is editing it, as from that time fet has released so many versions with many improvements that we would like to have, I ask if it's possible to add this feature to the official FET release, actually I think it was in some previous version, but not in the last one.

Thanks