machined: be more thorough when checking whether an image is writable or not
test: improve btrfs test case
copy: try top copy atime/time/xattrs when copying files
machinectl: left-align times
util: always override crtime xattr
import: minor improvements to dkr importer
import: beef up gpt importer to optionally make writable copy of read-only vendor image
import: properly remove pre-existing images if --force is used
machined: let's also check machine directories in /usr and /usr/local
machined: fix image search path iteration
machined: when discovering images, implicitly add ".host" as pseudo image referring to the host's own directory tree
import: make image root directory configurable, instead of hardcoding /var/lib/container
update TODO
machinectl: mark read-only images when listing in red
machined: make image read-only check indepenednt on own privs
machined: fix search patch magic for '.host' image
machinectl: add status commands
loginctl: add more --help sections
loginctl: reindent --help text
Fix check_loopback()

Add missing htonl() so that check_loopback() actually tests for 127.0.0.1
instead of 1.0.0.127 on little-endian machines.