+ 6.3 (Oct 21, 2021)
+ Interface changes:
+
+ + the definition of TERMTYPE2 is now internal, not visible in the ABI,
+ like the enclosing TERMINAL which was previously made opaque. This
+ was done to provide SCREEN-specific "static" variables in terminfo.
+
+ Added extensions:
+
+ + add sp-funcs for erasewchar, killwchar.
+
+ Added internal functions (other than "_sp" variants):
+
+ + _nc_safe_fopen and _nc_safe_open3 limit privileges if possible when
+ opening a file; otherwise disallow access for updating files.
+
+ + _nc_tiparm is a variant of tiparm which is used when all of the
+ parameters are known to be numbers rather than possibly strings.
+
+ + _nc_reset_tparm improves tic's checks by resetting the terminfo
+ "static variables" before calling functions which may update them.
+
+ Removed internal functions:
+
+ + none
+
+ Modified internal functions:
+
+ + _nc_trace_ttymode passes pointer to const data
+
+ + _nc_tparm_analyze passes pointer to int*, not int[]
+
+ 6.2 (Feb 12, 2020)
+ Interface changes:
+
+ + the terminal database must be compiled with ncurses 6.2 tic;
+ older versions of tic/infocmp will not work. Aside from that,
+ the compiled database will work with older applications.
+
+ + "*.pc" and "ncurses*-config" files give the same information.
+
+ + vwprintw and vwscanw are deprecated.
+
+ Added extensions:
+
+ + These make it simpler to substitute a debug-configuration of the
+ library for non-debug:
+ curses_trace
+ exit_curses
+ exit_terminfo
+
+ Added internal functions (other than "_sp" variants):
+
+ + These provide fast-lookup of common user-defined capabilities:
+ _nc_find_user_entry
+ _nc_get_userdefs_table
+ _nc_get_hash_user
+
+ + This is added to work around compiler-warnings:
+ _nc_fmt_funcptr
+
+ Removed internal functions:
+
+ + _nc_import_termtype
+
+ Modified internal functions:
+
+ + _nc_reserve_pairs no longer returns a value
+