+20220612
+ + modify waddch_literal() to allow for double-width base character when
+ merging a combining character (report by Gavin Troy).
+ + improve _tracecchar_t2() formatting of base+combining character.
+
+20220604
+ + add note on portable memory-leak checking in man/curs_memleaks.3x
+ + remove u6-u9 from teken-2018 -TD
+ + set "xterm-new" to "xterm-p370", add "xterm-p371" -TD
+