Bus.chown can keep current owner or group + Bus.chmod can use a permission mask to keep or remove permissions
Bus.chown can keep current owner or group + Bus.chmod can use a permission mask to keep or remove permissions

Signed-off-by: Mattias Andrée <3d72f033b30d63e7ff5f0b71398e9c45b66386a1@operamail.com>

maandree/python-bus,maandree/python-bus