net: stream: add unix socket

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Markus Armbruster <armbru@redhat.com> (QAPI schema)
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Jason Wang <jasowang@redhat.com>
diff --git a/qapi/net.json b/qapi/net.json
index d476d33..b4768ce 100644
--- a/qapi/net.json
+++ b/qapi/net.json
@@ -586,7 +586,7 @@
 #        or connect to (server=false)
 # @server: create server socket (default: false)
 #
-# Only SocketAddress types 'inet' and 'fd' are supported.
+# Only SocketAddress types 'unix', 'inet' and 'fd' are supported.
 #
 # Since: 7.2
 ##