mesos input plugin does not support https

[ericslaw]

Feature Request

Opening a feature request kicks off a discussion.

Proposal:

Support https as a url scheme for telegraf input plugin for mesos.
The config entry 'masters' could be expanded to include the scheme so that both http and https can be supported.

Current behavior:

In two locations within the mesos input plugin (lines 427 and 479 as of this writing)
the code constructs a URL presuming 'http://' only.

Desired behavior:

Support https.

Use case: [Why is this important (helps with prioritizing requests)]

security enabled mesos cluster monitoring is desired in our environment.