classpath/icedtea server updates

[Mark Wielaard <mark@xxxxxxxxx>]

Some classpath/icedtea servers changed networks/ip addresses on Sunday.
Changes should propagate through DNS on Monday. This can cause
connection errors to planet.classpath.org, builder.classpath.org
(buildbot and jenkins) and icedtea.wildebeest.org (hg backups).
Apologies for the late notice.