chore(DAV): fixup proxyexclude default value check

Co-authored-by: Kate <26026535+provokateurin@users.noreply.github.com>
Signed-off-by: Josh <josh.t.richards@gmail.com>

lib/private/Files/Storage/DAV.php

@@ -160,7 +160,7 @@ class DAV extends Common {
 		$this->client->setThrowExceptions(true);
 
 		$proxyExclude = Server::get(IConfig::class)->getSystemValue('proxyexclude', []);
-		if (!empty($proxyExclude)) {
+		if ($proxyExclude !== []) {
 			$this->client->addCurlSetting(CURLOPT_NOPROXY, implode(',', $proxyExclude));
 		}