Nginx is lightweight fast web server/reverse proxy and e-mail (IMAP/POP3) proxy. On April 7, 2015, Nginx officially released nginx-1.6.3 stable version which includes the following changes and bug fixes :
*) Feature: now the “tcp_nodelay” directive works with SPDY connections.
*) Bugfix: in error handling.
Thanks to Yichun Zhang and Daniil Bondarev.
*) Bugfix: alerts “header already sent” appeared in logs if the
“post_action” directive was used; the bug had appeared in 1.5.4.
*) Bugfix: alerts “sem_post() failed” might appear in logs.
*) Bugfix: in hash table handling.
Thanks to Chris West.
*) Bugfix: in integer overflow handling.
Thanks to Régis Leroy.