Far more efficient multi-port IPTables rules.
Just to be safe, use the single port form for IPTables when only a single destination port.
Upgraded redis from 2.6.13 to 2.6.16.
Bumped to ruby-build 20130901.
With the introduction of the generic provider we expanded our options beyond just the Linux and Windows platforms.  So, make sure we only run Linux tasks on the Linux instances.
Fog changed out the set of mocked DigitalOcean image names, causing these tests to fail.
Disable the Zerigo tests for the time being since fog broke its Zerigo mocks.
Lock Ruby 1.8 variants down to Nokogiri 1.5.x for travis testing.
Removing the allow_failures to see if it fixes the Gemfile matrix config.
Moved JAVA_OPTS to global environment to fix build matrix.
rbx-19mode should not use the 1.8.7 Gemfile.
ruby-head is failing when trying to install gems.  So it goes.
Re-enabled a bunch of encryption tests for JRuby now that there's an easy gem to enable JCE for us.

Note that we shouldn't handle this in rubber ourselves because the users should make the call on whether enabling crypto export is appropriate for their jurisdiction. Enabling just for our test suite should be fine though because there is no export.
Merge branch 'master' of github.com:rubber/rubber
Fixed the 1.8.7 Gemfile to support JRuby crypto tests.