Added module loading capabilities

Added basic module loading capabilities.
Created very basic modules

Signed-off-by: Gergely Polonkai (W00d5t0ck) <polesz@w00d5t0ck.info>

modules/auth-gsasl.c

@@ -0,0 +1,16 @@
+#include "module.h"
+
+int wxmppd_mod_auth_gsasl_load(funcptr *);
+
+const wxmppd_module_data_t module_data = {
+	"auth-gsasl",
+	"GNU SASL authentication extension",
+	(funcptr)wxmppd_mod_auth_gsasl_load,
+};
+
+int
+wxmppd_mod_auth_gsasl_load(funcptr *global_functions)
+{
+	/* Register authentication extension "auth-gsasl" */
+}
+