minor docs improvements

doc-src/modes.html

@@ -173,10 +173,10 @@ on port 80. You can test your app on the example.com domain and get all
 requests recorded in mitmproxy.
 
 - Say you have some toy project that should get SSL support. Simply set up
-mitmproxy with SSL termination and you're done (<code>mitmdump -p 443 -R
-http://localhost:80/</code>). There are better tools for this specific
-task, but mitmproxy is very quick and simple way to set up an SSL-speaking
-server.
+mitmproxy as a reverse proxy on port 443 and you're done (<code>mitmdump -p 443 -R
+http://localhost:80/</code>). mitmproxy auto-detects TLS traffic and intercepts it dynamically.
+There are better tools for this specific task, but mitmproxy is very quick and simple way to
+set up an SSL-speaking server.
 
 - Want to add a non-SSL-capable compression proxy in front of your server? You
 could even spawn a mitmproxy instance that terminates SSL (-R http://...),