N.B. lcurses merged into luaposix

[Reuben Thomas <rrt@...>]

For those who missed the news in the recent announcement of luaposix
5.1.12, lcurses (a curses binding for Lua) has now been merged into
luaposix.

curses is part of the POSIX standard, so it's logical, and it means
that two build systems which were pretty much identical and
increasingly complex could be merged, thus redressing the balance
between actual code and build system code!

The two libraries are still separate modules ("posix" and "curses"),
and building the curses module is optional (it will happen by default
if curses development files are found).

Thanks to recent help from Peter Billam, there will shortly be HTML
documentation available online for the curses module; it's also
included in the release.

-- 
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