nmap: Update to 7.80, add full variant, switch to Python 3

nmap: Update to 7.80, add full variant, switch to Python 3

* Update to 7.80

* Add "full" variants for nmap and ncat that support Lua scripts (and
  OpenSSL)

* Replace libcxx fix with upstream patch[1] (CHANGELOG change was
  removed)

* Switch ndiff to use Python 3 (using a patch from Debian[2], which
  comes from an upstream PR[3] plus a port of ndiff/setup.py)

[1]: https://github.com/nmap/nmap/commit/ea4e2d6657103a2c3d6f543a1a8619eb4d4472c8
[2]: https://salsa.debian.org/pkg-security-team/nmap/-/blob/0510c602dd45f4dc0b06a6f422a9b0855564ddbb/debian/patches/0004-Python3-port-of-ndiff.patch
[3]: https://github.com/nmap/nmap/pull/1807

Signed-off-by: Jeffery To <jeffery.to@gmail.com>