-j, --json_config help text and documentation are misleading

[Hydrochoerus]

The help text for -j, --json_config is misleading. The text is not completely clear that it means a global sensu configuration json key which stores the configuration. I initially thought that the param points to a file containing the config. The comments in the handler do not help either:

# Note: The default mailer config is fetched from the predefined json config file which is "mailer.json" or any other
#       file defiend using the "json_config" command line option.

Changing

-j, --json_config JsonConfig     Config Name

to

-j, --json_config JsonKey     Sensu config key containing mailer settings

or something similar might help a bit.

Alternatively changing the logic to match the documentation would be acceptable.

[majormoses]

closed via #51