PR/50932: David Binderman: use emalloc/erealloc/ecalloc

Passes WARNS=5, so don't set WARNS=4.

branches: 1.1.6; 1.1.12;
Import my terminfo implementation.
This uses the ncurses terminal definitions.

OK: core@, jdc@

Merge riastradh-drm2 to HEAD.

Use Mt for email addresses.

branches: 1.5.6; 1.5.12; 1.5.16;
Fix spelling, mark up NULL. Closes PR 44381 by Ryo HAYASAKA.

Reorder sections to canonical order.

Fix infocmp when both -a and -x are given as arguments.

Use .Ex for EXIT STATUS.

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

OK: core@, jdc@

infocmp: don't crash when a terminfo description does not have an alias

infocmp: strip versioning from aliases as well

infocmp: Strip versioning from terminfo name

Deal with both .db and .cdb extensions...

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.

branches: 1.12.10;
_ti_database now includes the database extension so don't duplicate it.

branches: 1.11.6;
CID 1356387: Wrong sizeof

PR/50932: David Binderman: use emalloc/erealloc/ecalloc

White space police.

terminfo uses CDB instead of DB

branches: 1.7.6; 1.7.12;
libterminfo can now compile a single terminfo description which allows
$TERMINFO to be a terminfo description as well as a file reference.

This enables the user to modify the terminfo description on read-only
media.

Report when using internal database.

Report if using internal database or not.

Fix infocmp when both -a and -x are given as arguments.

Store the aliases against the entry, so that infocmp can reproduce them.
Handy for creating smaller terminfo databases.

Make our unsigned char ports happy.

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

OK: core@, jdc@