Replace deprecated calls to defaults() by ?? and ?: in src/

src/Util/Network.php

@@ -104,7 +104,7 @@ class Network
 
 		$parts2 = [];
 		$parts = parse_url($url);
-		$path_parts = explode('/', defaults($parts, 'path', ''));
+		$path_parts = explode('/', $parts['path'] ?? '');
 		foreach ($path_parts as $part) {
 			if (strlen($part) <> mb_strlen($part)) {
 				$parts2[] = rawurlencode($part);
@@ -801,8 +801,8 @@ class Network
 		$i = 0;
 		$path = "";
 		do {
-			$path1 = defaults($pathparts1, $i, '');
-			$path2 = defaults($pathparts2, $i, '');
+			$path1 = $pathparts1[$i] ?? '';
+			$path2 = $pathparts2[$i] ?? '';
 
 			if ($path1 == $path2) {
 				$path .= $path1."/";