Merge pull request #583 in ZP/z-push from...

Merge pull request #583 in ZP/z-push from bugfix/ZP-1281-not-escaped-when-creating-icalendar to develop

* commit 'fff02881':
  ZP-1281 Fixed ':' not escaped when creating icalendar. Released under the Affero GNU General Public License (AGPL) version 3.

src/include/iCalendar.php

@@ -292,7 +292,7 @@ class iCalProp {
       default:
         $escaped = str_replace( '\\', '\\\\', $escaped);
         $escaped = preg_replace( '/\r?\n/', '\\n', $escaped);
-        $escaped = preg_replace( "/([,;])/", '\\\\$1', $escaped);
+        $escaped = preg_replace( "/([,;:])/", '\\\\$1', $escaped);
     }
     $property = sprintf( "%s%s:", $this->name, $this->RenderParameters() );
     if ( (strlen($property) + strlen($escaped)) <= 72 ) {