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, 8 insertions, 7 deletions

diff --git a/src/widgets/direct_connect_dialog.cpp b/src/widgets/direct_connect_dialog.cpp
index f8c77b85..9859889d 100644
--- a/src/widgets/direct_connect_dialog.cpp
+++ b/src/widgets/direct_connect_dialog.cpp
@@ -51,7 +51,7 @@ void DirectConnectDialog::onConnectPressed()
   QString l_hostname = ui_direct_hostname_edit->text();
   if (!SCHEME_PATTERN.match(l_hostname).hasMatch())
   {
-    l_hostname = "ws://" % l_hostname;
+    l_hostname = "wss://" % l_hostname;
   }
 
   QUrl l_url(l_hostname);
@@ -61,20 +61,21 @@ void DirectConnectDialog::onConnectPressed()
     return;
   }
 
-  if (l_url.scheme() != "ws")
+  if (l_url.scheme() != "ws" && l_url.scheme() != "wss")
   {
-    call_error(tr("Invalid URL scheme. Only ws:// is supported."));
+    call_error(tr("Invalid URL scheme. Only ws: and wss: are supported."));
     return;
   }
 
-  if (l_url.port() == -1)
+  int port = l_url.port();
+  if (port == -1)
   {
-    call_error(tr("Invalid server port."));
-    return;
+    port = (l_url.scheme() == "wss") ? 443 : 80;
   }
   ServerInfo l_server;
   l_server.address = l_url.host();
-  l_server.port = l_url.port();
+  l_server.port = port;
+  l_server.scheme = l_url.scheme();
   l_server.name = "Direct Connection";
 
   net_manager->connect_to_server(l_server);