+20210626
+ + add configure option --disable-root-access, which tells ncurses to
+ disallow most file-opens by setuid processes.
+ + use default colors in pccon "op" -TD
+ + correct rmacs/smacs in aaa+dec, aaa+rv -TD
+ + add hpterm-color2 and hp98550-color (Martin Trusler)
+ + regenerate man-html documentation.
+
+20210619
+ + improve configure-macro used for dependencies of --disable-leaks such
+ as --with-valgrind
+ + trim trailing blanks from files
+
+20210612
+ + fixes for scan-build, valgrind build/testing.
+ + update config.guess
+
+20210605
+ + add a summary of ncurses-specific preprocessor symbols to curses.h
+ (prompted by discussion with Peter Farley, Bill Gray).
+
+20210522
+ + regenerate configure scripts with autoconf 2.52.20210509 to eliminate
+ an unnecessary warning in config.log (report by Miroslav Lichvar).
+ + add a note in manual page to explain ungetch vs unget_wch (prompted
+ by discussion with Peter Farley).
+ + add sp-funcs for erasewchar, killwchar.
+ + modify wgetnstr, wgetn_wstr to improve compatibility with SVr4 curses
+ in its treatment of interrupt and quit characters (prompted by
+ report/testcase by Bill Gray)
+ + update config.guess, config.sub
+
+20210515
+ + improve manual pages for wgetnstr, newwin (prompted by
+ report/testcase by Bill Gray).
+
+20210508
+ + modify tputs' error check to allow it to be used without first
+ calling tgetent or setupterm, noting that terminfo initialization
+ is required for supporting the terminfo delay feature (report by
+ Sebastiano Vigna).
+ + fix several warnings from clang --analyze
+ + add null-pointer check in comp_parse.c, when a "use=" clause refers
+ to a nonexisting terminal description (report/patch by Miroslav
+ Lichvar, cf: 20210227).
+
+20210501
+ + add a special case in the configure script to work around one of the
+ build-time breakages reported for OpenBSD 6 here:
+ https://www.mail-archive.com/bugs@openbsd.org/msg13200.html
+ There is no workaround for the other issue, a broken linker spec.
+ + modify configure check for libtool to prevent accidental use of an
+ OpenBSD program which uses the same name.
+ + update config.guess, config.sub
+