+ finish changes to wgetch(), making it switch as needed to the
window's actual screen when calling wrefresh() and wgetnstr(). That
allows wgetch() to get used concurrently in different threads with
some minor restrictions, e.g., the application should not delete a
window which is being used in a wgetch().
+ simplify mutex's, combining the window- and screen-mutex's.
+ change test/ditto.c to use openpty() and xterm.
+ add locks for copywin(), dupwin(), overlap(), overlay() on their
window parameters.
+ add locks for initscr() and newterm() on updates to the SCREEN
pointer.
+ finish table in curs_thread.3x manpage.
+ 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,
