compact r->http_minor and r->http_major

src/http/ngx_http_request.h

diff --git a/src/http/ngx_http_request.h b/src/http/ngx_http_request.h
index 08ccd13..204d62f 100644
--- a/src/http/ngx_http_request.h
+++ b/src/http/ngx_http_request.h
@@ -330,8 +330,6 @@
 
     ngx_uint_t                        method;
     ngx_uint_t                        http_version;
-    ngx_uint_t                        http_major;
-    ngx_uint_t                        http_minor;
 
     ngx_str_t                         request_line;
     ngx_str_t                         uri;
@@ -456,6 +454,7 @@
     unsigned                          subrequests:8;
 
     /* used to parse HTTP headers */
+
     ngx_uint_t                        state;
     u_char                           *uri_start;
     u_char                           *uri_end;
@@ -475,6 +474,9 @@
     u_char                           *header_start;
     u_char                           *header_end;
 
+    unsigned                          http_minor:16;
+    unsigned                          http_major:16;
+
     ngx_uint_t                        header_hash;
     ngx_uint_t                        lowcase_index;
     u_char                            lowcase_header[NGX_HTTP_LC_HEADER_LEN];