Database updates are now performed asynchronously.
The web server starts but notifies the user with a
'please wait' message until the updates are completed.
The limit in the number of rows that can be retrieved from MySQL
has been made configurable. This is useful especially when downloading
historical flows in txt format.
- Added support for MariaDB (in addition to MySQL)
- Implemented reconnection if server/client disconnects
- Added support for both host and Unix socket connection to the DB