Feature request and my dirty patch: placeholders %u, %d in LDAP query_filter

[Zhang Huangbin]

Dear developers, 

The default placeholder, %m, in LDAP query filter will generate unwanted query values (e.g. @.domain.ltd, @domain.ltd, @.),  and no exact domain name (without prepended '@'). It would be great to support placeholders %u and %d in LDAP query_filter.

- %u: local part of email address. e.g. replaced by 'username' if email address is 'username at domain.ltd'.
- %d: domain part of email address. e.g. replaced by 'domain.ltd' if email address is 'username at domain.ltd'.

With these two new placeholders, we can clearly query mail user and mail domain in ldap filter. e.g.

- (&(objectClass=amavisAccount)(mail=%u@%d))
- (&(objectClass=amavisAccount)(domainName=%d))

Attachment is my dirty patch (i don't know Perl) for amavisd-new-2.8.0-pre7, tested and works for me.

----
Zhang Huangbin

iRedMail: Open Source Mail Server Solution for Red Hat Enterprise Linux,
CentOS, Scientific Linux, Debian, Ubuntu, Mint, Gentoo, openSUSE,
FreeBSD, OpenBSD: http://www.iredmail.org/

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