Podman machine AppleHV pass number 3

* Enabled user-mode networking with gvproxy
* VirtIOFS volumes supported

Signed-off-by: Brent Baude <bbaude@redhat.com>

[NO NEW TESTS NEEDED]

Signed-off-by: Brent Baude <bbaude@redhat.com>

pkg/machine/machine_unix.go

@@ -0,0 +1,35 @@
+//go:build darwin || dragonfly || freebsd || linux || netbsd || openbsd
+// +build darwin dragonfly freebsd linux netbsd openbsd
+
+package machine
+
+import (
+	"errors"
+	"strings"
+)
+
+// ParseVolumeFromPath is a oneshot parsing of a provided volume.  It follows the "rules" of
+// the singular parsing functions
+func ParseVolumeFromPath(v string) (source, target, options string, readonly bool, err error) {
+	split := strings.SplitN(v, ":", 3)
+	switch len(split) {
+	case 1:
+		source = split[0]
+		target = split[0]
+	case 2:
+		source = split[0]
+		target = split[1]
+	case 3:
+		source = split[0]
+		target = split[1]
+		options = split[2]
+	default:
+		return "", "", "", false, errors.New("invalid volume provided")
+	}
+
+	// I suppose an option not intended for read-only could interfere here but I do not see a better way
+	if strings.Contains(options, "ro") {
+		readonly = true
+	}
+	return
+}