nginx 0.7.34 *) Feature: the "off" parameter of the "if_modified_since" directive. *) Feature: now nginx sends an HELO/EHLO command after a XCLIENT command. Thanks to Maxim Dounin. *) Feature: Microsoft specific "AUTH LOGIN with User Name" mode support in mail proxy server. Thanks to Maxim Dounin. *) Bugfix: in a redirect rewrite directive original arguments were concatenated with new arguments by an "?" rather than an "&"; the bug had appeared in 0.1.18. Thanks to Maxim Dounin. *) Bugfix: nginx could not be built on AIX.

--- a/src/http/ngx_http_core_module.h
+++ b/src/http/ngx_http_core_module.h
@@ -28,6 +28,11 @@
 #define NGX_HTTP_SATISFY_ANY            1
 
 
+#define NGX_HTTP_IMS_OFF                0
+#define NGX_HTTP_IMS_EXACT              1
+#define NGX_HTTP_IMS_BEFORE             2
+
+
 typedef struct ngx_http_location_tree_node_s  ngx_http_location_tree_node_t;
 typedef struct ngx_http_core_loc_conf_s  ngx_http_core_loc_conf_t;