** Added capability to set a callback after the client hello is received

** Added capability to set a callback after the client hello is received
by the server in order to adjust parameters before the handshake.

** SRP was corrected to adhere (more) to the latest draft (published soon as RFC)

** Corrected bug which did not allow a server to run without supporting
certificates.

** Updated the DN parser which now prints wrongly decoded values as hex
strings.