Fix of "keepalive_disable" directive.

src/http/ngx_http_core_module.c

diff --git a/src/http/ngx_http_core_module.c b/src/http/ngx_http_core_module.c
index 7c44422..a1b49d7 100644
--- a/src/http/ngx_http_core_module.c
+++ b/src/http/ngx_http_core_module.c
@@ -143,7 +143,7 @@
 };
 
 
-static ngx_conf_enum_t  ngx_http_core_keepalive_disable[] = {
+static ngx_conf_bitmask_t  ngx_http_core_keepalive_disable[] = {
     { ngx_string("none"), NGX_HTTP_KEEPALIVE_DISABLE_NONE },
     { ngx_string("msie6"), NGX_HTTP_KEEPALIVE_DISABLE_MSIE6 },
     { ngx_string("safari"), NGX_HTTP_KEEPALIVE_DISABLE_SAFARI },
@@ -513,8 +513,8 @@
       NULL },
 
     { ngx_string("keepalive_disable"),
-      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
-      ngx_conf_set_enum_slot,
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE12,
+      ngx_conf_set_bitmask_slot,
       NGX_HTTP_LOC_CONF_OFFSET,
       offsetof(ngx_http_core_loc_conf_t, keepalive_disable),
       &ngx_http_core_keepalive_disable },
@@ -3475,9 +3475,11 @@
     ngx_conf_merge_msec_value(conf->client_body_timeout,
                               prev->client_body_timeout, 60000);
 
-    ngx_conf_merge_uint_value(conf->keepalive_disable, prev->keepalive_disable,
-                              NGX_HTTP_KEEPALIVE_DISABLE_MSIE6
-                              |NGX_HTTP_KEEPALIVE_DISABLE_SAFARI);
+    ngx_conf_merge_bitmask_value(conf->keepalive_disable,
+                              prev->keepalive_disable,
+                              (NGX_CONF_BITMASK_SET
+                               |NGX_HTTP_KEEPALIVE_DISABLE_MSIE6
+                               |NGX_HTTP_KEEPALIVE_DISABLE_SAFARI));
     ngx_conf_merge_uint_value(conf->satisfy, prev->satisfy,
                               NGX_HTTP_SATISFY_ALL);
     ngx_conf_merge_uint_value(conf->if_modified_since, prev->if_modified_since,