Add ability to use Ansible groups in generated inventory. Fixes #2551.
Add Ansible groups docs.
Fix Downloads link spacing
Merge pull request #2616 from mwarkentin/patch-1

website/www: fix Downloads link spacing
Update FreeBSD configure_networks with less shell specifics
guests/{ubuntu,debian}: fix change_host_name for trailing dots [GH-2610]

When `/etc/hosts` contained a FQDN with a trailing dot, the `\b` in the
sed expression would not match, since dot is not considered to be a word
character.

Fix this by regexp-escaping the hostname search, and matching the end of
the line on optional space followed by additional characters.

Also add some tests that extract the regexp used by sed and verify that
it does what we want. These will hopefully serve us in the future if we
ever need to test additional edge cases.
Merge pull request #2613 from phinze/2610-debian-hostname-trailing-dot

guests/{ubuntu,debian}: fix change_host_name for trailing dots [GH-2610]
Update CHANGELOG
website/docs: Links to new downloads page

Fixes #2623 and hashicorp/docs.vagrantup.com#45

[ci skip]
website/docs: Fix example of v1 config option invalid in v2

Fix the name of the old v1 option, `config.vm.forward_port`, used as an example of an invalid option in v2.
Update CHANGELOG

/cc @phinze style :)
Merge pull request #2620 from ShonM/master

guests/freebsd: Update FreeBSD configure_networks with less shell specifics
Update CHANGELOG
guests/redhat: don't ifdown non-existent interfaces [GH-2614]
mention chef.delete_node and chef.delete_client methods in the DOCS
guests/redhat: Don't error if ifdown fails [GH-2614]
Update is_port_open.rb
Merge pull request #2629 from lndbrg/patch-1

core: update is_port_open.rb comment
Merge pull request #2628 from makern/ifdown-fix

guests/redhat: Don't error if ifdown fails [GH-2614]
Merge pull request #2627 from scalp42/chef_delete

website/docs: mention chef.delete_node and chef.delete_client methods