commandref_join.html: Added placeholder/links for non-existent DE


git-svn-id: svn://svn.code.sf.net/p/fhem/code@4806 2b470e98-0d58-463d-a4d8-8e2adae1ed80
FBAHA doc: latin1 char replaced


git-svn-id: svn://svn.code.sf.net/p/fhem/code@4807 2b470e98-0d58-463d-a4d8-8e2adae1ed80