hexdump: used in debugging - will remove
msg_kexdh_init(): calculate correct value for for f
get_public_key_blob(): use private_key if public_key is empty
get_private_key_blob(): get private, not public vals
create(): initialize a fresh key (unused as of yet)
SSH_Server_Transport.__init__(): pass in a server key (should be able to support a list, though)
_connect(): undo accidental s2c/c2s swaps: (ehuss)
enable msg_unimplemented()
msg_newkeys(): call send_newkeys() *before* setting them
build in a DSS host key