One (client) list to rule them all

[Philip Race]

As per previous notice to this list [1],  the old 2d, awt, swing, beans 
and sound list
have been retired as of 12pm PDT today, 30th September. Their archives 
will remain available indefinitely.

All client-libs related discussions, notices, etc should be here from 
now on.

-Phil.

[1] 
https://mail.openjdk.java.net/pipermail/client-libs-dev/2021-September/000182.html