Add DAAP cache backend

src/db.c

@@ -40,6 +40,7 @@
 
 #include "conffile.h"
 #include "logger.h"
+#include "daap_cache.h"
 #include "misc.h"
 #include "db.h"
 
@@ -2500,6 +2501,8 @@ db_file_update(struct media_file_info *mfi)
 
   sqlite3_free(query);
 
+  daapcache_trigger();
+
   return 0;
 
 #undef Q_TMPL