Note: This is NOT disabling SplunkWeb. A UF does not have SplunkWeb ever at all, period. This is disabling the REST API server. This has side effects on the UF, such that the CLI largely (but not completely) quite working. See Matt's .conf talk:
http://conf.splunk.com/files/2016/recordings/universal-forwarder-security-dont-input-more-than-data-into-your-splunk-environment.mp4
http://conf.splunk.com/files/2016/slides/universal-forwarder-security-dont-input-more-than-data-into-your-splunk-environment.pdf
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