support Knot DNS master (3.1)

daemon/lua/kres-gen-29.lua

@@ -2,6 +2,13 @@
 
 local ffi = require('ffi')
 --[[ This file is generated by ./kres-gen.sh ]] ffi.cdef[[
+typedef long time_t;
+typedef long __time_t;
+typedef long __suseconds_t;
+struct timeval {
+	__time_t tv_sec;
+	__suseconds_t tv_usec;
+};
 
 typedef struct knot_dump_style knot_dump_style_t;
 extern const knot_dump_style_t KNOT_DUMP_STYLE_DEFAULT;