linux-sun-jdk16 out of support

[Ashley Williams]

Since java 1.6 is now out of support all of the relevant files have
been moved to the download archives.

The DOWNLOAD_URL in java/linux-sun-jdk16 and java/linux-sun-jre16
could better reflect this move and make it easier for users to find
the files if it points to somewhere like:

http://www.oracle.com/technetwork/java/javase/downloads/jdk6u35-downloads-1836443.html
or
http://www.oracle.com/technetwork/java/javasebusiness/downloads/java-archive-downloads-javase6-419409.html

Also, on the same topic, will this archival affect the existence of
these ports? Will it stick around as long as the files do or until
someone (whoever that is) decides it's not longer needed?