Feat: Add SSL support for webserver + websocket (#612)

* Feat: Add SSL support for webserver + websocket

Finally, Hyperion reaches the SSL century!
- Uses by default a internal key and certificate to provide working HTTPS out-of-the-box
- Your browser won't like that, for a green ssl seal next to the browser address bar you need to use Let's Encrypt with a own legit domain. This is out of the scope of Hyperion

libsrc/webserver/QtHttpServer.h

@@ -59,6 +59,8 @@ public slots:
 	void setServerName   (const QString & serverName)           { m_serverName = serverName; };
 	void setPrivateKey   (const QSslKey & key)                  { m_sslKey = key; };
 	void setCertificates (const QList<QSslCertificate> & certs) { m_sslCerts = certs; };
+	QSslKey getPrivateKey()                  					{ return m_sslKey; };
+	QList<QSslCertificate> getCertificates() 					{ return m_sslCerts; };
 
 signals:
 	void started            (quint16 port);