- Added incremental sql query collection file to make merging easier and avoid high patch file count

- Enable php-fpm socket mode as default.

 @see commit 9a8de140

Fixed: FS#3350 - [Dovecot] Warning: mysql: Query failed, retrying: Unknown column 'filter' in 'where clause'

- Use it like $app->conf('yourpluginname', 'config-key', 'value')
- omit the value to read the config value, provide it to set the value