Bug#985969: libvirt: Build with libssh

[Bastian Germann]

The original reason for the bug is fixed now. But please consider 
building with libssh (maybe additionally to libssh2 because libvirt does 
not support other host keys with libssh2 than RSA and DSA. When a host 
offers a different key algorithm it will error with "unsupported SSH key 
type".