OWX_ASYNC: fix commandref, add attribute interval

git-svn-id: svn://svn.code.sf.net/p/fhem/code@5526 2b470e98-0d58-463d-a4d8-8e2adae1ed80
OWX_ID: fix calling into sync OWX while in async-mode

git-svn-id: svn://svn.code.sf.net/p/fhem/code@5527 2b470e98-0d58-463d-a4d8-8e2adae1ed80
OWX_ASYNC: fix commandref

git-svn-id: svn://svn.code.sf.net/p/fhem/code@5528 2b470e98-0d58-463d-a4d8-8e2adae1ed80