Added the build option for the Watch mode for the sniffer. Instead of
setting a set of IP addresses and keys, you set a callback function.
When any TLS connection is started, the hook is called and a hash of the
peer certificate is given to the callback function. It has a chance to
load a private key into the sniffer session. Enable this option with the
build flag "WOLFSSL_SNIFFER_WATCH".
b61803f165