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, 2 insertions, 0 deletions

diff --git a/src/widgets/server_editor_dialog.h b/src/widgets/server_editor_dialog.h
index a8844d4b..7b0bb651 100644
--- a/src/widgets/server_editor_dialog.h
+++ b/src/widgets/server_editor_dialog.h
@@ -2,6 +2,7 @@
 
 #include "network/serverinfo.h"
 
+#include <QCheckBox>
 #include <QComboBox>
 #include <QDialog>
 #include <QDialogButtonBox>
@@ -29,6 +30,7 @@ private:
   QLineEdit *ui_name;
   QLineEdit *ui_hostname;
   QSpinBox *ui_port;
+  QCheckBox *ui_secure_cb;
   QPlainTextEdit *ui_description;
   QDialogButtonBox *ui_button_box;