corrected username

git-svn-id: svn://svn.code.sf.net/p/fhem/code@4683 2b470e98-0d58-463d-a4d8-8e2adae1ed80
YAMAHA_AVR: fixing minor mistakes in german commandref


git-svn-id: svn://svn.code.sf.net/p/fhem/code@4684 2b470e98-0d58-463d-a4d8-8e2adae1ed80