Added module loading capabilities

Added basic module loading capabilities.
Created very basic modules

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

modules/roster-sqlite3.c

@@ -0,0 +1,16 @@
+#include "module.h"
+
+int wxmppd_mod_roster_sqlite3_load(funcptr *);
+
+const wxmppd_module_data_t module_data = {
+	"roster-sqlite3",
+	"SQLite3 storage module for roster data storage",
+	(funcptr)wxmppd_mod_roster_sqlite3_load,
+};
+
+int
+wxmppd_mod_roster_sqlite3_load(funcptr *global_functions)
+{
+	/* Register roster storage extension "sqlite3" */
+}
+