fastnetmon: T4556: Allow configure white_list_path and populate with hosts/networks that should be ignored

[aalmenar]

fastnetmon: T4556: Allow configure white_list_path and populate with hosts/networks that should be ignored

Change Summary

Allow to set networks that should be excluded from fastnetmon protection

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, renaming)
• Refactoring (no functional changes)
• Migration from an old Vyatta component to vyos-1x, please link to related PR inside obsoleted component
• Other (please describe):

Related Task(s)

• https://phabricator.vyos.net/T4556

Component(s) name

fastnemon ddos-protection ids

How to test

This adds
set service ids ddos-protection excluded-network x.x.x.x/x
set service ids ddos-protection excluded-network xxxx::/x

Checklist:

• I have read the CONTRIBUTING document
• I have linked this PR to one or more Phabricator Task(s)
• I have run the components SMOKETESTS if applicable
• My commit headlines contain a valid Task id
• My change requires a change to the documentation
• I have updated the documentation accordingly