TODO list for a follow-up after #10878 has been merged:

• Replace ip-masq-agent file polling with fsnotify (BPF MASQ for veth mode and ip-masq-agent #11148 (comment))
• Support JSON for ip-masq-agent configuration.
• Move new code from common/ to pkg/utils (BPF MASQ for veth, ip-masq-agent and multi-dev NodePort #10878 (comment)).
• Add documentation for the features (mention BPF MASQ for veth mode and ip-masq-agent #11148 (comment), BPF MASQ for veth mode and ip-masq-agent #11148 (comment)).
• Determine automatically which device to use for the direct routing (BPF MASQ for veth, ip-masq-agent and multi-dev NodePort #10878 (comment)).
• List ip-masq-agent BPF map size in Documentation.
• Run tests against kernel 4.19 (BPF MASQ for veth, ip-masq-agent and multi-dev NodePort #10878 (comment)).
• Add global.nodePort.devices option to Helm (BPF MASQ for veth, ip-masq-agent and multi-dev NodePort #10878 (comment)).
• Check whether we can enable RLIMIT earlier, so that HaveFullLPM does not need to set on its own (BPF MASQ for veth, ip-masq-agent and multi-dev NodePort #10878 (comment)).
• Replace time.Sleep with callback/channel in ipmasq unit tests.
• Don't sleep in the ip-masq-agent CI tests (BPF MASQ for veth, ip-masq-agent and multi-dev NodePort #10878 (comment)).
• Check that LLVM generates a search-tree if there are more than 8 devices (BPF MASQ for veth, ip-masq-agent and multi-dev NodePort #10878 (comment)).
• Add tests to run BPF MASQ with XDP (BPF MASQ for veth, ip-masq-agent and multi-dev NodePort #10878 (comment)).
• Move MAC_BY_IFINDEX_MACRO generation into Go (BPF MASQ for veth, ip-masq-agent and multi-dev NodePort #10878 (comment)).
• Consider renaming the ip-masq-agent vars (BPF MASQ for veth, ip-masq-agent and multi-dev NodePort #10878 (comment)).
• In tunnel masq consider HOST_ID instead of REMOTE_HOST_ID when the latter is not available (BPF MASQ for veth mode and ip-masq-agent #11148 (comment)).
• Set rp_filter for DSR when multi-devs are attached (2485806#r38949134).
• Move snat_v6_needed () to lib/nat.h (datapath: Misc NAT changes #12749 (comment))