Mercury front-end

[Richard Kenner]

    My employer (The University of Melbourne) might perhaps have some
    claim on them.  I will probably be able to persuade them to sign a
    form either disclaiming ownership or assigning the rights to the FSF,
    for the C side of the changes.  For the Mercury side, and the existing
    Mercury compiler, that won't happen, since we (the Mercury group here)
    want the freedom to release the Mercury distribution under different
    licenses in future.

Note that you still have that freedom if you assign the copyright to
the FSF under the standard assignment agreement.