Set fastcgi_read_timeout to 180 seconds rather than the default 60 for the occasional long-running page.

src/etc/inc/system.inc

@@ -1344,6 +1344,7 @@ EOD;
 			fastcgi_pass   unix:{$g['varrun_path']}/php-fpm.socket;
 			fastcgi_index  index.php;
 			fastcgi_param  SCRIPT_FILENAME  \$document_root\$fastcgi_script_name;
+			fastcgi_read_timeout 180;
 			include        /usr/local/etc/nginx/fastcgi_params;
 		}
 	}