updated for version 7.4.391
Problem:    No 'cursorline' highlighting when the cursor is on a line with
	    diff highlighting. (Benjamin Fritz)
Solution:   Combine the highlight attributes. (Christian Brabandt)
Added tag v7-4-391 for changeset f051e50a6a5f
updated for version 7.4.392
Problem:    Not easy to detect type of command line window.
Solution:   Add the getcmdwintype() function. (Jacob Niehus)
Added tag v7-4-392 for changeset 589fd07888ab