Add sudo for redir
only use sudo with redir when port number is lower than 1024
add expect for warn message
enabled warning on the used environment for forward ports spec.
removed warn checks on test were the condition didn't apply.
Implement sorting of synced_folders

It's useful if you want to mount something inside /vagrant or if you
have some another mount in some synced folder.

This piece of code is extracted from virtualbox driver.
sudoers command now creates a safe wrapper script.

Sudoers now creates a safe wrapper script that performs sanity checks on sudo :
* wrapper generated in /usr/local/bin (name includes version to allow multiple wrappers on the same system)
* sudoers command now generates a one-line file in /etc/sudoers.d
* SudoWrapper use the new wrapper
* Removed unused Config#validate method
Removed unsecure calls to SudoWrapper#su_c.
Fix argument parsing
Fix sudoers for multiple users
clean redir pid with sudo only if port is < than 1024
Merge branch 'sudo-for-redir' of github.com:guerremdq/vagrant-lxc into sudo-for-redir
Update bundle
Remove development environment as I havent used it neither updated on a long time
Merge branch 'master' of https://github.com/servebox/vagrant-lxc
Update CHANGELOG
Update README
Merge branch 'sudo-for-redir' of https://github.com/guerremdq/vagrant-lxc
Fix code indentation
action/clear_forwarded_ports: Fix privileged port detection and simplify code [GH-259]
action/forward_ports: Merge port forwarding with sudo specs into a single file [GH-259]