Many of the examples provided within documentation are using a single
dash for the command line arguments, but the telegraf executable
explicitly has two dashes.
There are also some inconsistencies with the ordering of the command
line argument examples. I've ordered them so that the examples will
show: config, config-directory, input-filter, test
Also changing the net_response and http_response plugins to only accept
duration strings for their timeout parameters. This is a breaking config
file change.
closes#1214
