xrGame: Use xdg-open to open url links on Linux

Author: Zegeri

src/xrGame/MainMenu.cpp

@@ -26,8 +26,10 @@
 
 #include "ui/UICDkey.h"
 
+#ifdef WINDOWS
 #include <shellapi.h>
 #pragma comment(lib, "shell32.lib")
+#endif
 
 #include "Common/object_broker.h"
 
@@ -848,9 +850,14 @@ void CMainMenu::OnDownloadMPMap_CopyURL(CUIWindow* w, void* d)
 void CMainMenu::OnDownloadMPMap(CUIWindow* w, void* d)
 {
     LPCSTR url = m_downloaded_mp_map_url.c_str();
+#ifdef WINDOWS
     LPCSTR params = NULL;
     STRCONCAT(params, "/C start ", url);
     ShellExecute(0, "open", "cmd.exe", params, NULL, SW_SHOW);
+#else
+    std::string command = "xdg-open " + std::string{url};
+    system(command.c_str());
+#endif
 }
 
 demo_info const* CMainMenu::GetDemoInfo(LPCSTR file_name)

src/xrGame/login_manager.cpp

@@ -407,9 +407,14 @@ bool login_manager::get_remember_me_from_registry()
 
 void login_manager::forgot_password(char const* url)
 {
+#ifdef WINDOWS
     LPCSTR params = NULL;
     STRCONCAT(params, "/C start ", url);
     ShellExecute(0, "open", "cmd.exe", params, NULL, SW_SHOW);
+#else
+    std::string command = "xdg-open " + std::string{url};
+    system(command.c_str());
+#endif
 }
 
 } // namespace gamespy_gp