SSL CTXs should be created after the SSL library initialization, and be
kept until program termination.
Also, TLS version 1.1 and 1.2 are now supported for secure connections.
Previously only network errors could cause a restoration of a session,
but now a BYE response sent by the server can also trigger it.
An option has been also added to control if and when the recover
function will be called.
Move the source code to the src dir, the man pages to the doc dir, and
the example configuration files to the samples dir, and update all
relevant files to reflect the changes.