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File:		Backup.FPL
Author:		Daniel Stenberg
Email:		Daniel.Stenberg@sth.frontec.se, FidoNet 2:201/328
Short: 		Make backups at save-time
Version:	1.0
Date:		22.4.94
Local settings: "backup" ("_backup" is hidden)
Global settings: "backup_suffix"
Keysequence:
Type:		Hook
Prereq:
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FUNCTION

  The reason for this program is to save us all from the following scenario:
You load a file, modify and save it and then quit. You try to compile the
new file and after the compiler has discovered the 47 errors in the file,
you get second thoughts about the latest modification and want to get back the
previous version of the file.

  This program performs a safety copy of the file that is to be overwritten
by a save. The backup is only performed at the first save of the file.

  The backup file will get a suffix that defaults to ".bak" (changeable
through the "backup_suffix" global setting). If the backup file already exists
when the backup copy is about to perform, a requester will appear propting if
the file should be overwritten or not. Whether the answer is true or false,
the operation will be marked internally as if the backup has been done!

  The backup option is switchable on/off with the local boolean setting called
"backup".

BUGS
  None?