pidfile: Log when killing a process
pidfile: Log when killing a process

Whenever we kill a process using its pidfile, log a message. These may
be useful when trying to trace the origin of a spontaneous program exit.

Signed-off-by: Joe Stringer <16a9a54ddf4259952e3c118c763138e83693d7fd@covalent.io>

michi-covalent/cilium,cilium/cilium,michi-covalent/cilium,tklauser/cilium,cilium/cilium,scanf/cilium,cilium/cilium,tklauser/cilium,tklauser/cilium,scanf/cilium,michi-covalent/cilium,tgraf/cilium,tgraf/cilium,scanf/cilium,scanf/cilium,michi-covalent/cilium,scanf/cilium,cilium-team/cilium,scanf/cilium,michi-covalent/cilium,tgraf/cilium,tklauser/cilium,tgraf/cilium,tgraf/cilium,cilium-team/cilium,scanf/cilium,cilium/cilium,tgraf/cilium,tklauser/cilium,cilium/cilium