Update from 1.10.0 to 1.11.0.
Please read the following email to better understand how to use
new nginx unit features,
http://mailman.nginx.org/pipermail/unit/2019-September/000167.html
<ChangeLog>
*) Feature: basic support for serving static files.
*) Feature: isolation of application processes with Linux namespaces.
*) Feature: built-in WebSocket server implementation for Java Servlet
Containers.
*) Feature: direct addressing of API configuration options containing
slashes "/" using URI encoding (%2F).
*) Bugfix: segmentation fault might have occurred in Go applications
under high load.
*) Bugfix: WebSocket support was broken if Unit was built with some
linkers other than GNU ld (e.g. gold or LLD).
</ChangeLog>