"unsigned int".
- Remove redundant processing with machine->ssl is NULL.
- Remove compiler warnings about uninitialised 'ctx' (it's not used
uninitialised, but gcc can't see that).
- Add "-cipher" and "-out_state" command line arguments to control SSL
cipher-suites and handshake debug output respectively.
- Implemented error handling for SSL handshakes that break down. This uses
a cheat - storing a non-NULL pointer as "app_data" in the SSL structure
when the SSL should be killed.
