ssi - This module provides a filter which processes Server-Side Includes (SSI) in the input.
spdy - This module provides an SPDY implementation. (Deprecated, use IUSE="http2" instead)
sticky - Module to always forward clients to the same upstream server (via sticky cookies)
-stream_core - Stream core module for generic TCP proxying and load balancing.
stub_status - This module provides the ability to get some status from nginx.
sub - This module can search and replace text in the nginx response.
upload - Enable support for handling file uploads using multipart/form-data encoding