FS-6304 mod_rayo- fix race condition on outbound calls
Revert conference "tool" misfeature

This was added as part of a mass copyright header update in commit
6e7d5d089.  That's obviously not the right way to add features, so
we're reverting this.

If this feature is actually desired, it should be added in its own
commit, properly described in the commit message, and documented.

(The commit added a "tool" flag that could be applied to a conference
participant to mess with that person by disrupting his or her audio.)

This partially reverts commit 6e7d5d0897d253c5151b720327241e4bf03e0483.

This feature earlier tried to sneak in under the guise of a whitespace
cleanup in commit a000749e701dbb38130ec40fb592ce00da43eac9 which
Anthony reverted at commit a24f9aa8bc9a9e20d8c424ed69a9c63ecf2b9ede.

Let's not play these games.