Zuul is moving to an unbridged Matrix room. Remove eavesdrop from
the OFTC room, and add the Matrix room to the two new Matrix bots.
Change-Id: I9bf34c1f67c6dac41c3761f8ccde4d7fa76bbf89
Thin runs the new matrix-eavesdrop bot on the eavesdrop server.
It will write logs out to the limnoria logs directory, which is mounted
inside the container.
Change-Id: I867eec692f63099b295a37a028ee096c24109a2e