Variables: updated list of prefixes in ngx_http_rewrite_set().

src/http/modules/ngx_http_rewrite_module.c

diff --git a/src/http/modules/ngx_http_rewrite_module.c b/src/http/modules/ngx_http_rewrite_module.c
index 4081f87..f241196 100644
--- a/src/http/modules/ngx_http_rewrite_module.c
+++ b/src/http/modules/ngx_http_rewrite_module.c
@@ -930,7 +930,11 @@
     if (v->get_handler == NULL
         && ngx_strncasecmp(value[1].data, (u_char *) "http_", 5) != 0
         && ngx_strncasecmp(value[1].data, (u_char *) "sent_http_", 10) != 0
-        && ngx_strncasecmp(value[1].data, (u_char *) "upstream_http_", 14) != 0)
+        && ngx_strncasecmp(value[1].data, (u_char *) "upstream_http_", 14) != 0
+        && ngx_strncasecmp(value[1].data, (u_char *) "cookie_", 7) != 0
+        && ngx_strncasecmp(value[1].data, (u_char *) "upstream_cookie_", 16)
+           != 0
+        && ngx_strncasecmp(value[1].data, (u_char *) "arg_", 4) != 0)
     {
         v->get_handler = ngx_http_rewrite_var;
         v->data = index;