fixing one more link detection issue

lib/service/html.php

@@ -99,7 +99,7 @@ class Html {
 	 * @return string
 	 */
 	public function convertLinks($data) {
-		$regex = "/(ht|f)tp(s?)\:\/\/(([a-zA-Z0-9\-\._]+(\.[a-zA-Z0-9\-\._]+)+)|localhost)(\/?)([a-zA-Z0-9\-\.\?\,\'\/\\\+&%\$#_]*)?([\d\w\.\/\%\+\-\=\&\?\:\\\"\'\,\|\~\;]*)/";
+		$regex = "/(ht|f)tp(s?)\:\/\/(([a-zA-Z0-9\-\._]+(\.[a-zA-Z0-9\-\._]+)+)|localhost)(\/?)([a-zA-Z0-9\-\.\?\,\'\/\\\+&%\$#!_]*)?([\d\w\.\/\%\+\-\=\&\?\:\\\"\'\,\|\~\;]*)/";
 		$data = preg_replace($regex, "<a href=\"\\0\" target=\"_blank\" rel=\"noreferrer\">\\0</a>", $data);
 		return $data;
 	}

tests/service/htmltest.php

@@ -37,6 +37,7 @@ class TestHtml extends \PHPUnit_Framework_TestCase {
 			array('<a href="https://build.opensuse.org/package/view_file/isv:ownCloud:community:7.0/owncloud/debian.changelog?expand=1" target="_blank" rel="noreferrer">https://build.opensuse.org/package/view_file/isv:ownCloud:community:7.0/owncloud/debian.changelog?expand=1</a>', 'https://build.opensuse.org/package/view_file/isv:ownCloud:community:7.0/owncloud/debian.changelog?expand=1'),
 			array('(<a href="https://build.opensuse.org/package/view_file/isv:ownCloud:community:7.0/owncloud/debian.changelog?expand=1" target="_blank" rel="noreferrer">https://build.opensuse.org/package/view_file/isv:ownCloud:community:7.0/owncloud/debian.changelog?expand=1</a>)', '(https://build.opensuse.org/package/view_file/isv:ownCloud:community:7.0/owncloud/debian.changelog?expand=1)'),
 			array('<a href="http://apps.owncloud.com/content/show.php/Music?content=160485" target="_blank" rel="noreferrer">http://apps.owncloud.com/content/show.php/Music?content=160485</a>', 'http://apps.owncloud.com/content/show.php/Music?content=160485'),
+			array('<a href="https://groups.google.com/forum/#!forum/ctpug" target="_blank" rel="noreferrer">https://groups.google.com/forum/#!forum/ctpug</a>', 'https://groups.google.com/forum/#!forum/ctpug'),
 		);
 	}