Show statistics about active users.
http://<host>:8000/proc/user/ | root://<host>//proc/user/
?mgm.cmd=who
&eos.ruid=0
&eos.rgid=0
&mgm.format=json
&mgm.option=[cnzas]m
who [-c] [-n] [-z] [-a] [-m] [-s] : print statistics about active users (idle<5min)
-c - break down by client host
-n - print id's instead of names
-z - print auth protocols
-a - print all
-s - print summary for clients
-m - print in monitoring format <key>=<value>