nginx 0.5.18 *) Feature: the ngx_http_sub_filter_module. *) Feature: the "$upstream_http_..." variables. *) Feature: now the $upstream_status and $upstream_response_time variables keep data about all upstreams before X-Accel-Redirect. *) Bugfix: a segmentation fault occurred in master process after first reconfiguration and receiving any signal if nginx was built with ngx_http_perl_module and perl did not support multiplicity; bug appeared in 0.5.9. *) Bugfix: if perl did not support multiplicity, then after reconfiguration perl code did not work; bug appeared in 0.3.38.