add print-safe-config command to share current config with operators …

[greenhat]

Close #184 Close #175

[coveralls]

Pull Request Test Coverage Report for Build 3581327633

• 0 of 15 (0.0%) changed or added relevant lines in 3 files are covered.
• 3 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.3%) to 64.679%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
core/src/main.rs	0	2	0.0%
core/src/logging.rs	0	6	0.0%
core/src/cli_commands/print_conf.rs	0	7	0.0%
<!--	Total:	0	15	0.0%	-->

Files with Coverage Reduction	New Missed Lines	%
core/src/logging.rs	1	0%
core/src/main.rs	2	0%
<!--	Total:	3		-->

Totals
Change from base Build 3574548745:	-0.3%
Covered Lines:	1985
Relevant Lines:	3069

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💛 - Coveralls