[multipathd] use SIGUSR1 to reap waiters and reconfigure upon SIGHUP
[multipathd] use SIGUSR1 to reap waiters and reconfigure upon SIGHUP

Edward Goggin, EMC

unakatsuo/multipath-tools,unakatsuo/multipath-tools,vijaychauhan/multipath-tools,vijaychauhan/multipath-tools,grzn/multipath-tools-explained,grzn/multipath-tools-explained,gebi/multipath-tools,unakatsuo/multipath-tools