Omit read-denied rooms

sites/+components/tbl-communities.php

@@ -49,6 +49,14 @@
 	</tr>
 <?php foreach ($rooms as $id => $room): ?>
 	<?php
+		if ($room->read) {
+			// Skip unreadable rooms.
+
+			// While not necessary, this hack can later allow SOGS
+			// to pass server-wide info using hidden dummy rooms.
+			continue;
+		}
+
 		$pubkey = $room->server->get_pubkey();
 		$icon_hue = hexdec($pubkey[2] . $pubkey[2]);
 		$icon_color = "hsl($icon_hue, 80%, 50%)";