Mod_timerfd uses the Linux kernel timerfd API to create and use a kernel
timer that delivers timer expire notifications via a file descriptor,
for details read
https://freeswitch.org/confluence/display/FREESWITCH/mod_timerfd Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>