This work is derived from code obtained from 4thmouse.com.

In the comment section of this page on 4thmouse.com:

http://4thmouse.com/index.php/2008/02/20/netcat-clone-in-three-languages-part-i-ruby/

there was the following exchange between a commenter and
the site maintainer:

   "Can i re-use your code here with some modifications?"
   "Please do. All examples on the site are fair game."

We interpret this exchange as giving unrestricted permission to re-use
and modify this code.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.