libtls bindings for lua.

NOTE: this module is under heavy development.

this module depends on the libtls library installed on your system.
you can use either the libressl or libretls libraries.

• libressl-portable: https://github.com/libressl-portable/portable
• libretls: https://git.causal.agency/libretls/about/

luarocks install libtls

please see doc/README.md.