provisioners/puppet: windows module sep [GH-3731]
core: can add box with name of directory [GH-3732]
synced_folders/rsync: copy symlinks as real files [GH-3734]
core: retry acquire of dotlock [GH-3735]
remove `-v` flag from post-rsync `chmod`

OpenBSD `chmod` does not support the `-v` flag, which causes
`vagrant up` to fail.
Merge pull request #3743 from zigg/fix/master/openbsd-rsync-chmod

guests/openbsd: remove `-v` flag from post-rsync `chmod`
Update CHANGELOG.md
communicators/ssh: rescue another exception for reset
core: providers can choose to not be defaultable [GH-3742]
guests/linux: exclude symlinks from chown search [GH-3744]