- Add ncurses patch 20230615
+ modify _nc_read_file_entry() to show relevant filename in warnings.
+ improve checks in convert_string() for corrupt terminfo entry (report
and test-case by Gregory James Duck).

- Add ncurses patch 20230610
+ improve manpages discussing file descriptors in low-level functions.
+ modify flushinp to use file descriptors in SCREEN, rather than from
TERMINAL, and check if they are for a terminal, like SVr4.
+ modify mcprint to use file descriptor in SCREEN, for consistency.
+ add xterm+focus to foot+base (patch by Daniel Ekloef).
+ correct definition of Charable() for non-wide ncurses library (report
and test-case by Zbigniew Baniewski).

- Add ncurses patch 20230603
+ add configure option --with-strip-program, to override program
chosen by the install program for stripping executables (prompted
by discussion with Aapo Rantalainen).
+ fix typo in INSTALL (report/patch by Aapo Rantalainen).
+ improve error-checks for isEILSEQ()
+ increase MB_CUR_MAX to 16, matching glibc's MB_LEN_MAX.
+ corrected mouse mask in test/testcurs.c
+ improve thread lock in lib_trace.c
- Correct offsets of patch ncurses-6.4.dif

- Add ncurses patch 20230527
+ fixes for compiler warnings/cppcheck.