Admin-API boot runs ResellerAPI::init() on the login page (pre-auth), where the
$rPermissions global is still null. It passes that null straight into
ServerRepository::getStreamingSimple()/getProxySimple(), whose strict
`array $rPermissions` hint turned it into a fatal TypeError at boot:
ServerRepository::getStreamingSimple(): Argument #1 ($rPermissions) must be of
type array, null given, called in .../ResellerAPI.php on line 72
Both methods only read $rPermissions via isset($rPermissions['is_reseller']), so
null is functionally equivalent to "no reseller restriction". Make the param
`?array $rPermissions = null` on both (restoring pre-typing tolerance) rather
than patching all ~28 call sites that feed the global. The strict `array` type
stays on every other repository method that runs post-auth with a real array.
Add ServerRepositorySimpleTest as a regression (null perms, online filter,
reseller name masking, proxy list) against the SQLite TestDb.
