Fix to work around Ubuntu bug 553786 when working with a lucid image.
Fix to work around Ubuntu bug 553786 when working with a lucid image.

See: https://bugs.launchpad.net/ubuntu/+source/sudo/+bug/553786

otahi/vagrant-proxyconf,tmatilai/vagrant-proxyconf,mrsheepuk/vagrant-proxyconf,tmatilai/vagrant-proxyconf