add options help
diff --git a/auto/options b/auto/options
index 6a48076..7fb7131 100644
--- a/auto/options
+++ b/auto/options
@@ -264,6 +264,7 @@
--with-http_sub_module enable ngx_http_sub_module
--with-http_dav_module enable ngx_http_dav_module
--with-http_flv_module enable ngx_http_flv_module
+ --with-http_stub_status_module enable ngx_http_stub_status_module
--without-http_charset_module disable ngx_http_charset_module
--without-http_gzip_module disable ngx_http_gzip_module
@@ -301,6 +302,8 @@
--with-mail enable IMAP4/POP3/SMTP proxy module
--with-mail_ssl_module enable ngx_mail_ssl_module
+ --add-module=PATH enable an external module
+
--with-cc=PATH set path to C compiler
--with-cpp=PATH set path to C preprocessor
--with-cc-opt=OPTIONS set additional options for C compiler
