Merge of r3964, r3977, r3978: Proxy related fixes: *) finalizing with rc == 0 in unbuffered proxy mode caused nginx to wait for another send_timeout before actually closing client's connection if client timed out while still talking to upstream server *) update r3945 with more descriptive error message *) test length of proxy_pass with variables; patch by Lanshun Zhou

--- a/src/http/modules/ngx_http_fastcgi_module.c
+++ b/src/http/modules/ngx_http_fastcgi_module.c
@@ -2003,6 +2003,8 @@ ngx_http_fastcgi_create_loc_conf(ngx_con
 
     conf->catch_stderr = NGX_CONF_UNSET_PTR;
 
+    ngx_str_set(&conf->upstream.module, "fastcgi");
+
     return conf;
 }