Without these comments gcc7 will complain (-Wimplicit-fallthrough).

This fixes arut#1109.

Add  "fall through" comments to stop GCC 7 complaining

Thanks to Zengxian Ding.

Thanks to Zengxian Ding.

The change repeats nginx commit cb149fa03367 and is needed for stream pass
module to be able to pass connections to rtmp.

While rtmp module does not support SSL, starting from nginx 1.25.5 an SSL
connection can be passed from nginx stream pass module.  Such connections
should be shut down on connection closure.

An rtmps example:

rtmp {
    server {
        listen 1935; # rtmp
        application foo {
            live on;
        }
    }
}

stream {
    server {
        listen 1936 ssl; # rtmps
        ssl_certificate example.com.crt;
        ssl_certificate_key example.com.key;
        pass 127.0.0.1:1935;
    }
}

Thanks to Dmitry Tsidilin.