updated for version 7.4.001
Problem:    Character classes such as [a-z] to not react to 'ignorecase'.
	    Breaks man page highlighting. (Mario Grgic)
Solution:   Add separate items for classes that react to 'ignorecase'.  Clean
	    up logic handling character classes.  Add more tests.
Added tag v7-4-001 for changeset 3e9107b86b68