Test failure on Windows, perhaps specific to filesystem type of TemporaryFolder.

java.nio.file.FileSystemException: …\.ssh\known_hosts: Incorrect function.
        at sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:86)
        at sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:90)
        at sun.nio.fs.WindowsAclFileAttributeView.getFileSecurity(WindowsAclFileAttributeView.java:88)
        at sun.nio.fs.WindowsAclFileAttributeView.getOwner(WindowsAclFileAttributeView.java:121)
        at sun.nio.fs.FileOwnerAttributeViewImpl.getOwner(FileOwnerAttributeViewImpl.java:91)
        at java.nio.file.Files.getOwner(Files.java:2079)
        at org.apache.sshd.common.util.io.IoUtils.getFileOwner(IoUtils.java:272)
        at org.apache.sshd.common.util.io.ModifiableFileWatcher.validateStrictConfigFilePermissions(ModifiableFileWatcher.java:240)
        at org.apache.sshd.client.keyverifier.DefaultKnownHostsServerKeyVerifier.reloadKnownHosts(DefaultKnownHostsServerKeyVerifier.java:79)
        at org.apache.sshd.client.keyverifier.KnownHostsServerKeyVerifier.verifyServerKey(KnownHostsServerKeyVerifier.java:161)
        at …
Interactive testing of known_hosts on XP works as expected.