#24 FIX: Quieten flexbackup

[Keilaron]

Anyone who uses flexbackup in a cron job surely gets the "syntax OK" message mailed to them each time the job runs, which is rather annoying when it runs properly.
The fix is simple: "Syntax OK" is not an error, it's a regular message, and therefore it belongs in STDOUT and not STDERR.
Thus, this modification:
Line 2418 goes from:
system("perl -c \"$configfile\"");
to:
system("perl -c \"$configfile\" 2>&1");