Remove blocks in [] and {} from link descriptions

see https://docs.librenms.org/Extensions/Interface-Description-Parsing/

Author: rlanyi

gengraph.php

@@ -78,6 +78,14 @@
 
 $knownlinks = update_palette($knownlinks);
 
+if (!isset($_GET['keep_link_descr'])) {
+	foreach ($knownlinks as $key => $link) {
+		$knownlinks[$key]['descr'] = trim(preg_replace('/\{([^{}]*+|(?R))*\}/', '', $knownlinks[$key]['descr']));
+		$knownlinks[$key]['descr'] = trim(preg_replace('/\[([^\[\]]*+|(?R))*\]/', '', $knownlinks[$key]['descr']));
+		$knownlinks[$key]['descr'] = trim(preg_replace('!\s+!', ' ', $knownlinks[$key]['descr']));
+	}
+}
+
 if ($compat_rrdtool12) {
 	/* cannot use full-size-mode - must estimate height/width */
 	$height -= 65;