Dynamically load avahi libraries if they are available

sunshine/platform/linux/misc.h

@@ -0,0 +1,14 @@
+#ifndef SUNSHINE_PLATFORM_MISC_H
+#define SUNSHINE_PLATFORM_MISC_H
+
+#include <vector>
+
+namespace dyn {
+typedef void (*apiproc)(void);
+
+int load(void *handle, const std::vector<std::tuple<apiproc *, const char *>> &funcs, bool strict = true);
+void *handle(const std::vector<const char *> &libs);
+
+} // namespace dyn
+
+#endif