allow memached_pass inside "if" block

src/http/modules/ngx_http_memcached_module.c

diff --git a/src/http/modules/ngx_http_memcached_module.c b/src/http/modules/ngx_http_memcached_module.c
index 76a37e1..1f156cd 100644
--- a/src/http/modules/ngx_http_memcached_module.c
+++ b/src/http/modules/ngx_http_memcached_module.c
@@ -58,7 +58,7 @@
 static ngx_command_t  ngx_http_memcached_commands[] = {
 
     { ngx_string("memcached_pass"),
-      NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
+      NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF|NGX_CONF_TAKE1,
       ngx_http_memcached_pass,
       NGX_HTTP_LOC_CONF_OFFSET,
       0,