v261
tree-wide: Introduce sd-forward.h and shared-forward.h headers
sd-device: use ERRNO_IS_NEG_DEVICE_ABSENT() for device-id load failures (#41764)
libsystemd: Clean up includes
sd-device: drop support of udev database version 0
libsystemd: make check-pointer-deref clean
sd-device: also add device_get_sysattr_streq()
sd-device: do not include file name directly in error messages
tree-wide: rename unref_and_replace_full to unref_and_replace_new_ref
many: fix remaining check-pointer-deref issues