[php-src] Issue #13941: IMAP PHP function - send custom comands before login RFC 2971

Issue: https://github.com/php/php-src/issues/13941 Author: bnchdan ### Description Hi, I have a question about the imap PHP function url. Context: If you host an application ( with IP x.x.x.x ) that makes a login to an IMAP server with imap_open() function from a client with IP y.y.y.y. The logs on the IMAP server will show the x.x.x.x IP, not the IP from the client. If the IMAP server is Dovecot you can send a command before the login process **ID ("x-originating-ip" "y.y.y.y" )** RFC 2971 url , and Dovecot will log the correct IP. url Is it possible to send the command **ID ("x-originating-ip" "y.y.y.y" )** on imap_open() function or are you considering implementing it on a new version.? Thanks