SkmsgEnable will compile and attach the SK_MSG programs to the
sockmap. After this all sockets added to the cilium_sock_ops will
have sendmsg/sendfile calls running through BPF program.
SockmapDisable will detach any sockmap programs from cgroups then "unload"
all the programs and maps associated with it. Here "unload" just means
deleting the file associated with the map.
SockmapEnable will compile sockops programs and attach the sockops programs
to the cgroup. After this all TCP connect events will be filtered by a BPF
sockops program.