Changes with nginx 0.5.15 19 Mar 2007

*) Feature: the mail proxy supports authenticated SMTP proxying and the "smtp_auth", "smtp_capablities", and "xclient" directives. Thanks to Anton Yuzhaninov and Maxim Dounin.

*) Feature: now the keep-alive connections are closed just after receiving the reconfiguration signal.

*) Change: the "imap" and "auth" directives were renamed to the "mail" and "pop3_auth" directives.

*) Bugfix: a segmentation fault occurred in worker process if the CRAM-MD5 authentication method was used and the APOP method was disabled.

*) Bugfix: if the "starttls only" directive was used in POP3 protocol, then nginx allowed authentication without switching to the SSL mode.

*) Bugfix: worker processes did not exit after reconfiguration and did not rotate logs if the eventport method was used.

*) Bugfix: a worker process may got caught in an endless loop, if the "ip_hash" directive was used.

*) Bugfix: now nginx does not log some alerts if eventport or /dev/poll methods are used.