Subcommand TRACKING not supported

[theyueli]

Probably this is the first issue to resolve towards integration with relay (a php cache)

After installing relay properly for php, create a test file

$ cat test.php
<?php

$relay = new \Relay\Relay(host: '127.0.0.1');
var_dump($relay->ping('hello'));

Launch DF, and execute the script

$ php ./test.php

will return

bool(false)

meanwhile, DF logs:

E20231106 11:53:40.836475 2183706 server_family.cc:1210] Subcommand TRACKING not supported

when Redis was launched, executing the script produces

$ php ./test.php
string(5) "hello"