netifyd: update to v4.4.1

netifyd: update to v4.4.1

- Explicitly request the C++11 standard (codebase is not C++17 compliant).
- Removed categories.json from conffiles -- it's not a configuration
  file.
- Removed commented-out convenience git hash place-holder -- for some
  reason it irritates people.
- Added radix header file to devel files.
- Removed redundant call to Build/Configure (not needed).

Co-authored-by: Tianling Shen <redacted>
Signed-off-by: Darryl Sokoloski <redacted>