First cut at implementing SELECTSAVED for VMS. Unfortunately, it only
works by default if the player is using a [probably] shared account called
"games" or "nethack", and displaying a menu of games available to restore
will likely have the side-effect of encouraging other players sharing that
account to steal each others saved games. To use it with a normal account,
the player has to include "-ugames" or "-unethack" on the command line
(or OPTIONS=name:games in config file) to force the program to reach the
"Who are you?" stage.
I've added a flag argument to set_savefile_name() so regularization
can be suppressed, allowing it to be used to construct a wildcarded file
specification. I'm using that for VMS and have attempted to put in place
for WIN32CON, but the latter is not tested.
The current WIN32CON and UNIX+QT_GRAPHICS methods of collecting save
file names is bug-prone if used on a shared playground directory. Counting
matching file names first, then allocating memory and retraversing the
directory to copy those names into the allocated memory has a window of
vulnerability where the number of matching files could increase between the
counting and the copying.
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