adding smb sync folder implementation for windows guests addressing #3699
filter host IPs to those that resolve on guest when finding addresable IPs on a windows guest
Merge pull request #4209 from mwrock/smb_sync

adding smb sync folder implementation for windows guests addressing #3699
Add security note for public networks
Merge pull request #4601 from davidjb/master

Add security note to documentation for public networks
Check whether Salt bootstrap script exists before attempting to delete it. GH-4614
Force compatible Bundler version in Travis
Merge pull request #4625 from tmatilai/travis_bundler

Force compatible Bundler version in Travis
docs - http sharing: fix typo
Merge pull request #4632 from janek-warchol/patch-1

docs - http sharing: fix typo
Allow SSH LogLevel to be overridden
Merge pull request #4638 from julienvey/ssh_log_level

Allow SSH LogLevel to be overridden in Vagrant.Util.SSH.exec
whitespace
Merge pull request #4615 from styro/fix/master/issue-4614

provisoiners/salt: Check whether Salt bootstrap script exists before deleting it. GH-4614
Update CHANGELOG
Update wording for unreleased boxes
Use SSL to download docker gpg key.

Fixed #4569