[pptp-server] server crash - subscriber changes lost for ~5 days

[Christopher Schulte]

I had a server lockup/crash today which corrupted the pptp-server list 
config python database.  The fallback database was also hosed over.  I 
restored from the most recent backup, which was about 5 days ago.

Thus, all user changes (subscriptions, un-subscriptions, preferences, etc) 
after Apr  7 were lost.  Several messages were delivered twice, also.

Sorry for the inconvenience.

--Chris