Fix apcupsd documentation to reflect actual plugin (#6377)

plugins/inputs/apcupsd/README.md

@@ -1,4 +1,4 @@
-# apcupsd Input Plugin
+# APCUPSD Input Plugin
 
 This plugin reads data from an apcupsd daemon over its NIS network protocol.
 
@@ -23,10 +23,10 @@ apcupsd should be installed and it's daemon should be running.
 - apcupsd
   - tags:
     - serial
+    - status (string representing the set status_flags)
     - ups_name
-    - status
   - fields:
-    - online
+    - status_flags ([status-bits][])
     - input_voltage
     - load_percent
     - battery_charge_percent
@@ -38,8 +38,11 @@ apcupsd should be installed and it's daemon should be running.
     - time_on_battery_ns
 
 
+
 ### Example output
 
 ```
-apcupsd,serial=AS1231515,ups_name=name1,host=server1 time_on_battery=0,load_percent=9.7,time_left_minutes=98,output_voltage=230.4,internal_temp=32.4,battery_voltage=27.4,input_frequency=50.2,online=true,input_voltage=230.4,battery_charge_percent=100 1490035922000000000
+apcupsd,serial=AS1231515,status=ONLINE,ups_name=name1 time_on_battery=0,load_percent=9.7,time_left_minutes=98,output_voltage=230.4,internal_temp=32.4,battery_voltage=27.4,input_frequency=50.2,input_voltage=230.4,battery_charge_percent=100,status_flags=8i 1490035922000000000
 ```
+
+[status-bits]: http://www.apcupsd.org/manual/manual.html#status-bits