Indicate the possible values for S_COLORS environment variable in
iostat, mpstat and sar manual pages.
Signed-off-by: Sebastien GODARD <sysstat@users.noreply.github.com>
.IP S_COLORS
When this variable is set, display statistics in color on the terminal.
+Possible values for this variable are
+.IR never ,
+.IR always
+or
+.IR auto
+(the latter is the default).
.IP S_TIME_FORMAT
If this variable exists and its value is
.IP S_COLORS
When this variable is set, display statistics in color on the terminal.
+Possible values for this variable are
+.IR never ,
+.IR always
+or
+.IR auto
+(the latter is the default).
.IP S_TIME_FORMAT
If this variable exists and its value is
.IP S_COLORS
When this variable is set, display statistics in color on the terminal.
+Possible values for this variable are
+.IR never ,
+.IR always
+or
+.IR auto
+(the latter is the default).
.IP S_TIME_DEF_TIME
If this variable exists and its value is