I see two list addresses currently in use and I need to update my 
filtering rules

Q1. Why are there currently two addresses in use?

Namely,

ant-user@jakarta.apache.org
user@ant.apache.org

...

Isn't the first consistently with the naming conventions used by all 
Apache lists.

I see that Ant has moved to a top level project so why does the old 
address
still need to be supported?