enhanced commandref_de text

git-svn-id: svn://svn.code.sf.net/p/fhem/code@4797 2b470e98-0d58-463d-a4d8-8e2adae1ed80
fix commandref_de

git-svn-id: svn://svn.code.sf.net/p/fhem/code@4798 2b470e98-0d58-463d-a4d8-8e2adae1ed80