logging TLS SNI hostname

[Arkadiusz Miśkiewicz]

Is there a way to log SNI hostname used in TLS session? Info is there in 
SSL_CTX_set_tlsext_servername_callback, dovecot copies it to
ssl_io->host.

Unfortunately I don't see it expanded to any variables ( 
http://wiki.dovecot.org/Variables ). Please consider this to be a feature 
request.

The goal is to be able to see which hostname client used like:

May 30 08:21:19 xxx dovecot: pop3-login: Login: user=<abc>, method=PLAIN, 
rip=1.1.1.1, lip=2.2.2.2, mpid=17135, TLS, SNI=pop3.somehost.org, 
session=<hfS9Qwk03sBTBnrN>

-- 
Arkadiusz Miśkiewicz, arekm / ( maven.pl | pld-linux.org )