providers/docker: vagrant_machine setting works proprely
providers/hyperv: lower priority for Windows
providers/virtualbox: higher priority than default
website/docs: document global-status upgrade notes
core: Environment#cwd should expand path to full path
core: MachineIndex#valid? checks state and ID again
providers/docker: smarter about setting ID to nil for machine
providers/docker: less hack way to clear ID if not created
core: if state ID is NOT_CREATED_ID, destroy machine state
core: MachineIndex valid test is better
providers/*: use special NOT_CREATED_ID if not created
providers/docker: smarter destroy, does not require host machine
providers/docker: don't reload if not created
Fix typo
Merge pull request #3640 from felixrabe/patch-1

Fix typo