- see if we can drop more message validation on the sending side
- support "const" properties as flag
- add API to clone sd_bus_message objects
- SD_BUS_COMMENT() macro for inclusion in vtables, syntax inspired by gdbus
- see if we can drop more message validation on the sending side
- support "const" properties as flag
- add API to clone sd_bus_message objects
- SD_BUS_COMMENT() macro for inclusion in vtables, syntax inspired by gdbus