ejthurgo/log validation

[ejthurgo]

• Allow hostname or IP address
• Refactored AddLoggingCondition, broke out creation of web and WAF logs.
• Logging and conditons now only created if config file has valid log configs.
• Creation off logging endpoints can now be explicitly disabled through CLI arg --no-logs
• Refactored CLI output to past-tense.

Resolves issue: https://github.com/fastly/waflyctl/issues/70 Resolves issue: https://github.com/fastly/waflyctl/issues/71 Resolves issue: https://github.com/fastly/waflyctl/issues/91

[fgsch]

@ejthurgo @marklkelly Is this still relevant or superseded by #96?

[ejthurgo]

I think some aspects of this were taken into 96. @marklkelly would be the authority on this.