CFT: replacement of cddl/contrib/opendtrace with the OpenDTrace version

[George Neville-Neil]

Howdy,

I've created a new project and organization on githhub for maintaining 
bits of DTrace, including the DTrace Toolkit.  I have imported the last 
known version of the toolkit into this repo:

https://github.com/opendtrace/toolkit

I have then applied all the changes made by Rui Paolo, Ed Maste and 
myself within a "freebsd" branch in that repo.

Before 11.0 I intend to remove the toolkit from the FreeBSD repo and 
maintain it separately, along with scripts and versions for the other 
operating systems that support DTrace.  I'd like folks to test this 
replacement on FreeBSD.  It should be as simple as:

?> rm /usr/src/cddl/contrib/dtracetoolkit
?> git clone https://github.com/opendtrace/toolkit.git
?> git checkout -b freebsd

I've tested this locally on my systems but I'd like to hear feedback 
from others before I pull the scripts from our tree.

Best,
George