Support Secure WebSocket

Add full WSS support to public server list (using wss_port, overriding
insecure port), favorite servers list, and direct connections, and show
which servers are secure.

Revert the upstream's removal of `legacy` ServerInfo field, as I use it
to filter out legacy servers. To differentiate schemes, the `scheme`
field is used, either "ws" or "wss". I don't see the reason to add "tcp"
protocol when we don't even support it.

For the UI, add icons for secure and insecure connections. Highlight
secure servers with a green background.

In the favorite server dialog, a checkbox was added to select whether
the server is using WSS.

In the direct connection dialog, support "wss" scheme and default ports:
80 for WS, 443 for WSS, as per the WebSocket specification.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/networkmanager.cpp b/src/networkmanager.cpp
index 02d5961e..a7bb54ef 100644
--- a/src/networkmanager.cpp
+++ b/src/networkmanager.cpp
@@ -63,17 +63,17 @@ void NetworkManager::ms_request_finished(QNetworkReply *reply)
     if (entry.contains("wss_port"))
     {
       server.port = entry["wss_port"].toInt();
-      server.protocol = "wss";
+      server.scheme = "wss";
     }
     else if (entry.contains("ws_port"))
     {
       server.port = entry["ws_port"].toInt();
-      server.protocol = "ws";
+      server.scheme = "ws";
     }
     else
     {
       server.port = entry["port"].toInt();
-      server.protocol = "tcp";
+      server.legacy = true;
     }
 
     if (server.port != 0)