ws
Fix wbxml logging of empty tags.

If an empty tag is output, we shouldn't log the next closing tag
since the empty tag includes the closing tag.
Remove useless check.
Remove useless parameter.
Use self::
Properly merge the two arrays.
Fix setting LASTVERBEXECUTED properties during change retrieval.
Only set the flag property if we have a flag.

EAS specs say an empty flag property will also clear an existing flag.
Simplify
Fix phpdoc
LASTVERBEXECUTIONTIME must be a Horde_Date.