Tell collector to watch the .log.1 files to avoid missing records aro…

[dsessler7]

…und rotation time.

Add comments around each components filelog receiver settings.

Checklist:

• Have you added an explanation of what your changes do and why you'd like them to be included?
• Have you updated or added documentation for the change, as applicable?
• Have you tested your changes on all related environments with successful results, as applicable?
  • Have you added automated tests?

Type of Changes:

• New feature
• Bug fix
• Documentation
• Testing enhancement
• Other

What is the current behavior (link to any open issues here)?

What is the new behavior (if this is a feature change)?

• Breaking change (fix or feature that would cause existing functionality to change)

Other Information:

[benjaminjb]

No blockers, LG

[benjaminjb]

I think extra security here is fine, though I think Patroni's filehandler inherits the Python rotating behavior: queue a log to emit; check if you have to rotate; rotate if necessary; finish emitting the log.