lnstat, nstat, ifstat: update man pages
New json option
diff --git a/man/man8/lnstat.8 b/man/man8/lnstat.8
index a76940b..699ddf4 100644
--- a/man/man8/lnstat.8
+++ b/man/man8/lnstat.8
@@ -33,6 +33,9 @@
.B \-i, \-\-interval <intv>
Set interval to 'intv' seconds.
.TP
+.B \-j, \-\-json
+Display results in JSON format
+.TP
.B \-k, \-\-keys k,k,k,...
Display only keys specified.
.TP
diff --git a/man/man8/rtacct.8 b/man/man8/rtacct.8
index fb9afe8..c3ab03d 100644
--- a/man/man8/rtacct.8
+++ b/man/man8/rtacct.8
@@ -15,33 +15,35 @@
are simple tools to monitor kernel snmp counters and network interface statistics.
.SH OPTIONS
-.TP
--h -?
+.B \-h, \-\-help
Print help
.TP
--v -V
+.B \-V, \-\-version
Print version
.TP
--z
+.B \-z, \-\-zero
Dump zero counters too. By default they are not shown.
.TP
--r
+.B \-r, \-\-reset
Reset history.
.TP
--n
+.B \-n, \-\-nooutput
Do not display anything, only update history.
.TP
--a
+.B \-a, \-\-ignore
Dump absolute values of counters. The default is to calculate increments since the previous use.
.TP
--s
+.B \-s, \-\-noupdate
Do not update history, so that the next time you will see counters including values accumulated to the moment of this measurement too.
+.B \-j, \-\-json
+Display results in JSON format.
.TP
--d <INTERVAL>
+.B \-d, \-\-interval <INTERVAL>
Run in daemon mode collecting statistics. <INTERVAL> is interval between measurements in seconds.
.TP
--t <INTERVAL>
+
Time interval to average rates. Default value is 60 seconds.
+.TP
.SH SEE ALSO
lnstat(8)