Fix ampersand encoding in message URLs

Resolves #235.

inc/functions.php

@@ -26,6 +26,13 @@ function cleanString($string) {
 	return str_replace($search, $replace, $string);
 }
 
+function cleanQuotes($string) {
+	$search = array("'", "\"");
+	$replace = array("'", """);
+
+	return str_replace($search, $replace, $string);
+}
+
 function plural($count, $singular, $plural) {
 	if ($plural == 's') {
 		$plural = $singular . $plural;

inc/html.php

@@ -95,8 +95,8 @@ function _makeLinksClickable($matches) {
 	if (!isset($matches[1])) {
 		return '';
 	}
-	$url = str_replace('&', '&', htmlspecialchars($matches[1], ENT_QUOTES));
-	$text = htmlentities($matches[1], ENT_QUOTES);
+	$url = cleanQuotes($matches[1]);
+	$text = $matches[1];
 	return '<a href="' . $url . '" target="_blank">' . $text . '</a>';
 }