[Dovecot] [PATCH] change old style SASL discovery code

Hello,

this patch reworks old-style SASL discovery code. With this patch applied it advertises all configured SASL mechanisms. It makes possible for MS Outlook to use all installed security service providers (SSP), so if someone crazy enough will write CRAM-MD5 or DIGEST-MD5 SSP we'll support it readily :)

Please consider applying.

Best regards.

-- Andrey Panin | Linux and UNIX system administrator pazke@donpac.ru | PGP key: wwwkeys.pgp.net