Mail: discard pipelined commands after SMTP STARTTLS.
Mail: discard pipelined commands after SMTP STARTTLS.

The bug had appeared in nginx 1.5.6 (04e43d03e153).

Reported by Chris Boulton.

firebase/nginx,hy0kl/nginx,hy0kl/nginx,hy0kl/nginx,firebase/nginx,firebase/nginx,firebase/nginx