As described in tech-userlevel:
- Modify the writing code to only write entries in the new
format for the terminal descriptions that require it.
- Store new format entries as <name>@v3
- Store old format entries with clamped values as <name> for
backwards compatibility
- Lookup first <name>@v3 and then <name> if that is not found.
- Don't create terminfo2 anymore; old programs keep working with
clamped entries, and new programs be able to use the wide
fields with using the original db file.

terminfo: promote numeric parameters from short to int

POSIX mandates implementations must support upto a short but may exceed it.
When NetBSD terminfo was implemented, no terminfo description used over
a short, but because ncurses has supported ints for some time, some now do.

Infact, such a terminfo description was imported where colour pairs for
screen-256color went up to 65536 which exposed a bug in the existing
implementation where it set to zero. Because the number might mean
something more than a range, we need to be able to store it accurately.

This requires a version bump because whilst the API hasn't changed thanks
to C int promotion, the ABI has. Also the underlying database structure
has changed as well - we now store the numeric paramter inside a uint32_t
field rather than a uint16_t one.
Whilst this change can still read the old style database, the old one
cannot read the new one and thus we now maintain the database as
terminfo2.cdb, leaving the old library and database alone so old programs
still work fine.

libcurses, libfrom, libmenu and libpanel have also been bumped to
accomoate this change.

Switch terminfo(3) to cdb(5).

branches: 1.2.6; 1.2.8;
Retain commented out capabilities by default.

Import my terminfo implementation.
This uses the ncurses terminal definitions.

OK: core@, jdc@

fix quotes

branches: 1.1.4;
simple import script

terminfo: Our local changes are now upstream; reduce diff to upstream.

The changes look bigger than they are, this also removes some
settings that are inherited from the vt220 entry.

Add missing comma. Noted by Thomas E. Dickey.

merge changes, but keep our old wscons description

s/from from/from/ in comment.

merge 20200606: resolve conflict by adding kb2 and rin entries to putty

merge our changes

For wsvt25, stop disabling color attributes for underlined text.

With this change, underlined text is drawn in correct colors if
MD backend of wscons is underline-capable.

As the removed comment said, we render underlined text in red, if
MD backend of wscons does not support underline. However, this is
done regardless of original color attributes; foreground color is
forcibly changed to red. So, we don't need to disable original
colors for underlined.

branches: 1.11.12;
Remove kLFT and kRIT from putty.
This allows left and right cursor key movement inside tmux on putty.
See https://github.com/tmux/tmux/issues/708.

Sync our changes.

Import terminfo-20170128.src

branches: 1.8.2; 1.8.4;
Correct the x68k's Backspace key behavior.
With this fix, the Backspace key on x68k keyboard erases
previous one character, instead of outputting '^?' character.
Reported by Yasushi Oshima (two months ago..)

branches: 1.7.4; 1.7.6;
Import terminfo-20130607.src + mbalmers typo patch
All our prior patches have been incorporated.

Pull in fix for PR misc/47674 from ncurses:

# 2013-03-23
# * change initialization for vt220, similar entries for consistency
# with cursor-key strings (NetBSD #47674) -TD

branches: 1.5.2;
Add a delete key capability to our wsvt25 entry. Fixes a problem noted by
David Lord on netbsd-users.

branches: 1.4.2; 1.4.4;
According to the Oxford Dictionary of Etymology, a wether is a male sheep
or ram.

Add civis and cnorm to our wsvt25 entry thanks to Onno van der Linden.

Import a newer terminfo.src from upstream.

branches: 1.1.1; 1.1.4;
Import my terminfo implementation.
This uses the ncurses terminal definitions.

OK: core@, jdc@