Add multiple handlers, some in "root" some in "self"

New handlers:
   /proc/latency_stats
   /proc/self/latency
   /proc/ioports
   /proc/iomem
   /proc/timer_stats
   /proc/self/schedstat
   /proc/self/coredump_filters
   /proc/self/oom_score
   /proc/self/oom_adj
   /proc/self/oom_score_adj