Update ncurses and associated libraries (form, panel, menu) to
6.4-20230826 (from 5.7-20081102).

Based on result from Thomas Dickey's ncu2openbsd script and then
modified. Switches to the upstream t

Update ncurses and associated libraries (form, panel, menu) to
6.4-20230826 (from 5.7-20081102).

Based on result from Thomas Dickey's ncu2openbsd script and then
modified. Switches to the upstream tput. Major bump for the ncurses
libraries and for libedit and libreadline.

Help from tb, millert.

ok deraadt sthen

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Remove obsolete tbl suffix from ncurses man pages, no objections from
millert.

Need to run these through tbl.

ncurses 4.1 + changes to work with our terminfo libs (instead of
the ncurses ones). Changes are #ifdef EXTERN_TERMINFO.
Post 4.1 patches will be applied in a separate commit.

Install ncurses as -lcurses and <curses.h>
Install BSD curses library as -locurses and <ocurses.h>