Squashed commit of the following:

Squashed commit of the following:

commit 90deaafa9db083ecdb9e0e30ad3694317e616399
Merge: f392dfd 32cf7bb
Author: Doug Coleman <doug.coleman@gmail.com>
Date:   Tue Sep 21 00:33:37 2010 -0500

    Merge branch 'icmp-ping' of git://github.com/mrjbq7/factor into icmp-ping2

commit 32cf7bb0e0b876309bce248944dfeca243f02594
Author: John Benediktsson <mrjbq7@gmail.com>
Date:   Fri Sep 10 14:01:47 2010 -0700

    ping: Adding a simple IPv4 ping implementation.

commit da0c5ce7acf1407256c3ac2b98ac5b68858878c1
Author: John Benediktsson <mrjbq7@gmail.com>
Date:   Fri Sep 10 14:01:15 2010 -0700

    io.sockets.icmp: Adding ICMP support.

commit 60fdf7e7d995d63c11be87e8e1398f7bdd593833
Author: John Benediktsson <mrjbq7@gmail.com>
Date:   Fri Sep 10 14:00:48 2010 -0700

    io.sockets: Adding protocol support for sockets.

commit 2f130f1f9e0e2ea44d798beaad244a9c33b0d86a
Author: John Benediktsson <mrjbq7@gmail.com>
Date:   Fri Sep 10 14:00:28 2010 -0700

    Adding getprotobyname().