Log Message:
toxcore: Import new package, version 0.2.4.

Packaged initially in wip and updated by iphydf (toxcore author)
in joyent/pkgsrc-wip#98.

Toxcore is a p2p network level library that provides encrypted
communication and data transfer between peers who can find each
other anonymously through a DHT.  The peers are identified with
a 256 bit public key to be used for message encryption.  The
protocol specification can be found at https://toktok.ltd/spec.