Nicolas HAHN

- added new partition_create and create_parts functions with the aim to stop managing table partitions using the old school way (by inheritance). Partitions will be managed using standard partitioned tables. the create_parts function will have to be called directly using SELECT command scheduled in pg_cron extension.

- bug fix: wrong return type in function wui_buildslist

- Implemented UTF8 decoding of Subject column

- in wui_userquarantinedlist() SQL function, for the ELSEMC, local ELSE administrators can now see the full list of quarantined emails for all the users that are members of the groups and email domains they are a member of.

- In trig_smtpd() function, insert into quarantined(...) is made in an unique violation exception catching block

- Added envelop and header columns to quarantined SQL table

- Added column content to quarantined SQL table

- updated wui_userquarantinedlist() SQL function to provide the date at which the quarantined will be automatically deleted