New rules should have their id multiple of 10

[fzipi]

We are adding random rule numbers, mostly when creating sibling rules in other paranoia levels. Somehow in the past we added even sequential ruleids, which now look like it was a bad idea.

We should prevent then, when adding a new rule, to use a ruleid that is does not end in a multiple of 10.

The only exceptions could be on rules within:

• the initialization ruleid range: 901000-901999, and
• the crs-setup.conf.example file: 900000-900999

[airween]

I'm afraid it's hard to decide what is the new rule, I mean how can we decide about a rule if it's new or not?

[fzipi]

Using the PR diff?

[airween]

Is it possible to split the causes and get the diff like this?

- name: Get diff
  run: |
    if [ "${{ github.event_name }}" == "pull_request" ]; then
      git diff origin/${{ github.base_ref }}...HEAD > pull.diff
    else
      git diff HEAD^ HEAD > pull.diff
    fi