Retiring jackd1

[ryan at synca.io]

Hi,

I recently ran into a problem with jackd1 not being compatible with some 
other software (mixxx).

I think I ended up with jackd1 as a result of upgrade, but not sure how 
it got installed as opposed to jackd2, which seems to be the default.

Checking the rdepends on jackd1, it seems like nothing other than jack 
packages depend on it, so wondering if it should be removed.

cheers,

ryan.