provisioner/docker: Verbose output for docker provisioner

guest/freebsd: fix interface device names in /etc/rc.conf

provisioners/cfengine: Changing default repo URL.

core: selecting for duration of timeout can cause hang

Update Windows Salt provisioner version

communicators/winrm: handle errors that do not set an exit code

Ignoring SSHKeyBadOwner if user is root (uid 0)

core: Scrub SSH PTY output to filter out command echo-ing and most other cruft

[GH-4403]

Use -f argument to rm to force-remove files.

When using pty=true, removing files using sudo may request confirmation,
which will hang the connection.

Similarly, sometimes assumptions about file existence may be wrong and
in those cases it seems better to continue on as long as the file does
not exist, so -f makes sense there, too.

typofixes - https://github.com/vlajos/misspell_fixer

Allows using `sudo vagrant up` without `chown`ing the insecure private key

Verbose output for docker build and pull tasks

fix should_upload_file, write to stdout before exit 1

When specifying a timeout, the subprocess used to select for timeout seconds on the stdout, stderr pipes.

This creates a race condition and can cause the `Subprocess#execute` to hang for the full timeout interval if the process has already exited and no more output is send to the pipes.

This race is happening with a higher probability if the subprocess is generating a lot of output.

providers/hyper-v: fixes import for hyper-v generation 2 VMs