netifyd: Updated to v2.98

netifyd: Updated to v2.98

Maintainer: Darryl Sokoloski / @dsokoloski
Compile tested: arm_cortex-a15_neon-vfpv4, TP-Link Archer C2600, master
Run tested: TP-Link Archer C2600

Change log for v2.98:

[FIX] OpenWrt: Silence ABI warnings.
[FIX] Fixed socket buffer dead-lock (pop < 0 bytes).
[FIX] Silenced site UUID errors (moved to debug level).
[FIX] Updated to SPDX identifier for GPL license.

[IMP] Migrated from libjson-c to nlohmann JSON for Modern C++.
[IMP] Updated agent status with CPU utilization and sink service status.
[IMP] Reformatted sink queue utilization status output.
[IMP] Support OS-specific restarting.
[IMP] Added payload upload and update frequency control.
[IMP] Added MAC addresses to JSON interface list.
[IMP] Added option to send established flows to connecting clients.
[IMP] Added offline capture processing script.

Signed-off-by: Darryl Sokoloski <darryl@sokoloski.ca>