String

Sets ERR if string from client different from str option.

Options:

• reinit - if str is empty and reinit option exists, str will be initialized to string from client.

• empty_err - if client string is empty, ERR is set

• emtpy_ok - if client string is empty, OK is set (even if it’s different from str)

• dynamic - if client string different from str, alert is sent, but indicator will be OK, and str will be updated to client string.