ncurses 6.5 - patch 20240518

ncurses 6.5 - patch 20240518

+ improve formatting/style of manpages (patches by Branden Robinson).
+ move makefile's -DTRACE into include/ncurses_cfg.h, to simplify use
  of CFLAGS/CPPFLAGS.
+ improve check for clock_gettime(), from xterm.
+ modify configure script to work around broken gnatgcc script found in
  gcc-13 builds.