systemd: split "nm-sd.h" out of "nm-sd-adapt.h"
Now we have: "nm-sd.h" is a header file of NetworkManager with utilities related to systemd. It can be used anywhere freely. Also, systemd headers that are considered public API (like "sd-event.h") can be used without restrictions. When compiling the systemd sources, we always must include "nm-sd-adapt.h" as first. Similarly, systemd headers must not include "nm-sd-adapt.h", because they are either public (in which case the adapter is not needed) or they are internal (in which case they are themself included via a systemd source). Sometimes, we must internal API (like "dhcp-lease-internal.h"). In this case, we also must include "nm-sd-adapt.h".
Showing with 179 additions and 124 deletions