[RFC] Add htonll, ntohll?

[Roland McGrath]

I don't think anyone has a plan.  I'm not sure anyone cares.  We already
have htobe64 and be64toh, which are identical to what htonll and ntohll
would be.  Those are arguably better interface names than the old "n" ones,
since "be" for big-endian is more obviously talking about big-endian than
is "n" for network.  It's hard to see a case for adding aliases for
interfaces we already have, just for parity with an ancient interface.