MFH: r526586
Fix accidental overwriting of properties on update
See:
https://github.com/iocage/iocage/issues/1130
https://github.com/iocage/iocage/commit/b47dc2c47ff125d644720b03f598a9caf4e08192
PR: 244252
Approved by: portmgr (runtime fix blanket)