(handshake_command): New first argument, a resource to be adopted
by the connection. Deleted the kexinit argument, kexinit is now
passed as an attribute of handshake_info.

* src/handshake.h (handshake_info): New attribute kexinit.

Rev: src/handshake.c:1.28
Rev: src/handshake.h:1.9