Add option to always send scancodes

Default is enabled to match v0.19.1 behavior

Fixes #1233

src/config.cpp

@@ -441,6 +441,7 @@ namespace config {
     true,  // keyboard enabled
     true,  // mouse enabled
     true,  // controller enabled
+    true,  // always send scancodes
   };
 
   sunshine_t sunshine {
@@ -1039,6 +1040,8 @@ namespace config {
     bool_f(vars, "keyboard", input.keyboard);
     bool_f(vars, "controller", input.controller);
 
+    bool_f(vars, "always_send_scancodes", input.always_send_scancodes);
+
     int port = sunshine.port;
     int_f(vars, "port"s, port);
     sunshine.port = (std::uint16_t) port;