lmtp: Removed lmtp_address_translate setting. It is assumed not to be used.

lmtp: Added lmtp_hdr_delivery_address=final|original|none setting. This controls what username is used for logging Delivered-To: header and the "for user@domain" in Received: header. The default "final" is the regular username as earlier, "original" logs the RFC822 address received via ORCPT parameter or fallbacks to username, "none" logs nothing.

lmtp: Added lmtp_user_concurrency_limit setting. This allows limiting the number of concurrent deliveries to a single user. Useful in case one user is receiving a lot of mails and causing other deliveries to be delayed. If the limit is reached, Dovecot returns temporary failure error at DATA stage.

lmtp: Added lmtp_rcpt_check_quota setting to check quota already on RCPT TO.

lmtp: Added lmtp_address_translate setting. The idea is that if you need userdb lookup to be done with a special kind of a username like user:domain@extrainfo, you can set lmtp_address_translate=%n:%d@ which translates the address to user@domain after the userdb lookup is done.

lmtp: Implemented Postfix-compatible XCLIENT extension for changing client's ip/port.

lmtp: Fixed assert-crashing on 3rd client connection.

lmtp: Get banner text from login_greeting setting.

lmtp: Added lmtp_save_to_detail_mailbox setting.

lmtp: Recent change broke accessing mail_temp_dir. Also when it happened, an error message wasn't always logged.

Added mail_temp_dir setting, used by deliver and lmtp for creating temp mail files.

lib-master: Added support for caching config lookups. Currently caching won't work if config has any remote {} blocks. --HG-- branch : HEAD

lmtp: memdup default settings so RCPT TO settings lookups won't overwrite them. --HG-- branch : HEAD

Changed all settings related structs to const and changed APIs to make it work. --HG-- branch : HEAD

lmtp: Added lmtp_proxy setting (it's no longer hardcoded to yes). --HG-- branch : HEAD