lua kr_request_t::selected:tostring(): adjust style

The result gets logged as a single multi-line message,
so let's not repeat any prefix on (some of) those in-the-middle lines.

daemon/lua/kres.lua

@@ -797,15 +797,15 @@ ffi.metatype( kr_request_t, {
 			assert(ffi.istype(kr_request_t, req))
 			local buf = {}
 			if #req.answ_selected ~= 0 then
-				table.insert(buf, string.format('[%05d.00][dbg ] selected rrsets from answer sections:\n', req.uid))
+				table.insert(buf, ';; selected from ANSWER sections:\n')
 				table.insert(buf, tostring(req.answ_selected))
 			end
 			if #req.auth_selected ~= 0 then
-				table.insert(buf, string.format('[%05d.00][dbg ] selected rrsets from authority sections:\n', req.uid))
+				table.insert(buf, ';; selected from AUTHORITY sections:\n')
 				table.insert(buf, tostring(req.auth_selected))
 			end
 			if #req.add_selected ~= 0 then
-				table.insert(buf, string.format('[%05d.00][dbg ] selected rrsets from additional sections:\n', req.uid))
+				table.insert(buf, ';; selected from ADDITIONAL sections:\n')
 				table.insert(buf, tostring(req.add_selected))
 			end
 			return table.concat(buf, '')