Remove macOS stuff. Upstream has fixed it in the same way.
Add SOL_TCP define. Taken from elsewhere in the code.
Refreshed patches.
Signed-off-by: Rosen Penev <rosenp@gmail.com>
For some reason, the generated configure script fails to properly set up
the internal preprocessor command variable, causing the host OS check for
Darwin to fail after the last update.
Explicitly setting CPP fixes this issue
Signed-off-by: Felix Fietkau <nbd@nbd.name>