Revert "Merge branch 'inherit-spampolicy' of git.ispconfig.org:thom/ispconfig3 into add-domain-button"

This reverts commit a2cf4b73

See issue #4984

Prevent 60 seconds delay in mailbox creation when mapping of mailbox zui and gid to web uid and gid is not used.

- mail accounts not locked when client locked
- mail account sending and receiving lock separated
- fixed error in query
- fixed wording to match separeted locks

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

do not change parameter order in old functions

do not change parameter order in old functions

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Feature can be activated over admin mailserver settings. when activated websites uid is used instead of standard vmail-uid. this only takes effect if web and mailserver are on the same server, otherwise it will be old behaviour. switching this setting when mailboxes exist doesn't matter. Mailboxfolder will be created with website uid for this. access of postfix and dovecot now works over mysql-table mail_user. virtual_uid_maps is changed from static to mysql-table. for dovecot<->postfix communication protocoll is changed vrom lda to lmtp. disablelmtp-column is added to mail_user-table. uid and gid can be overwritten by remoting.
ONE OPEN ISSUE: since remoting has completly changed and mail_user_add function is missing at the moment, this function now was inclulded again. it is important to add the both new lines to the future function and then remove this new one.

Added: Changed idn function to support multi-line fields (like mail forward)

Fixed/Implemented: replaced intval() by $app->functions->intval() in all interface functions due to big number problem in intval()