scanbuttond:
 * remove maxlength attribute from cgi-script as it prevents users from pasting the scripts
 * based on [http://freetz.org/ticket/2111#comment:5 feedback] from [https://github.com/lemmy]
 * refs #2111


git-svn-id: file:///var/svn/freetz/trunk@10588 149334a1-2f27-0410-a3b9-fc62619ac1e6