This "release 6.0.2" commit is big because we also announce Long Time
Support of the 6.0 branch, a new set of repositories and explain that
the packaging changes intended for 6.0.0 is not included before now.

This adds the source for Varnish Cache 6.0.2.

Update the table of releases (6.1.1 replaces 6.1.0), and create
the associated release file.

This adds the source for 6.1.0.

Update the table of releases with 6.1.0, and create the associated
release file.

This adds the source for 6.1.0.

Update the table of releases with 6.0.1, and create the associated
release file.

This adds the source for 6.0.1.