nmap: please readd ssh2 embedded dependency

[Gianfranco Costamagna]

Hello,
>Even that wouldn't work 100% because of different build-dependencies in
>debian/control.


actually it would, because ubuntu main can't runtime-depends on universe packages,
at built time it can pick whenever it wants, just it shouldn't runtime depend on it
(so, depending on libssh2-dev and using the bundled one should work)

G.