+20070630
+ + add "widec" row to _tracedump() output to help diagnose remaining
+ problems with multi-column characters.
+ + partial fix for refresh of window on top of multi-column characters
+ which are partly overwritten (report by Sadrul H Chowdhury).
+ + ignore A_CHARTEXT bits in vidattr() and vid_attr(), in case
+ multi-column extension bits are passed there.
+ + add setlocale() call to demo_panels.c, needed for wide-characters.
+ + add some output flags to _nc_trace_ttymode to help diagnose a bug
+ report by Larry Virden, i.e., ONLCR, OCRNL, ONOCR and ONLRET,
+