PLT-5286 Adjust default logging configuration for each component and document

[jhbertra]

• Adds --print-log-config option for each runtime service
• Disables all send recv and database logs by default
• Adds documentation for the log config.

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[bwbush]

Wonderful! I think these are appropriate defaults for production deployment. For development and testing, we can turn up the verbosity.

I suppose there is no type-safe way to ensure (via compiler warnings) that we remember to add the correct entries to things like defaultRootSelectorLogConfig if we later expand the logging?

[jhbertra]

I suppose there is no type-safe way to ensure (via compiler warnings) that we remember to add the correct entries to things like defaultRootSelectorLogConfig if we later expand the logging?

Alas, no. Our options for this are:

1. Generate this stuff with template Haskell
2. Use a row-based approach to specifying selectors instead of GADTs (i.e. extensible Variants and records for selectors and config, respectively).