To add Session defaults.

For example special key-word

When a session with this key-word is provided those connection parameters are used for every key in this plugin, but overwritten by parameters provided in the key or in the session provided by the key.

Note! Originally it was discussed that it will affect every key. Which means even if you would submit and empty key, and have connection defaults provided in the configuration file, the key will use those defaults. Maybe it is better to use defaults only if session is provided?