- Replace the control string code with a clean protocol. Beginnings of
this are in control.c, control.h and control.txt

- Add notification of window size changes. (should use abobe protocol)

- Write rsh/rshd replacement, perhaps mux stderr messages over ssl 
channel and demux them at the client (remember this when writing 
protocol).

- Security review

- Specify paths to certificates and CA directories using autoconf

- Add script for users to create their own key and CSR

- Add script to CA to sign CSRs

- Documentation

- GTK tool to manage keys, CSRs, CAs, etc