Move OpenWebpage() to a separate source file.

server/TracyWeb.cpp

@@ -0,0 +1,29 @@
+#ifdef _WIN32
+#  include <windows.h>
+#  include <shellapi.h>
+#else
+#  include <stdio.h>
+#  include <stdlib.h>
+#endif
+
+#include "TracyWeb.hpp"
+
+namespace tracy
+{
+
+void OpenWebpage( const char* url )
+{
+#ifdef _WIN32
+    ShellExecuteA( nullptr, nullptr, url, nullptr, nullptr, 0 );
+#elif defined __APPLE__
+    char buf[1024];
+    sprintf( buf, "open %s", url );
+    system( buf );
+#else
+    char buf[1024];
+    sprintf( buf, "xdg-open %s", url );
+    system( buf );
+#endif
+}
+
+}