Add safeIpv4 and safeIpv6

[ttrig]

What is the reason for this PR?

Add the posibility to generate "safe" documentation IP addresses:

• IPv4 Address Blocks Reserved for Documentation
• IPv6 Address Prefix Reserved for Documentation

• A new feature
• Fixed an issue (resolve #ID)

Author's checklist

• Follow the Contribution Guide
• New features and changes are documented

Summary of changes

Added two new methods:

• safeIpv4
• safeIpv6

Review checklist

• All checks have passed
• Changes are added to the CHANGELOG.md
• Changes are approved by maintainer

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed after 1 week if no further activity occurs. Thank you for your contributions.

[brother]

I think the issue is valid as proposed.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed after 1 week if no further activity occurs. Thank you for your contributions.

[brother]

Still a neat feature suggestion. Having real IPs in test data is not a great pattern really.

[pimjansen]

Still a neat feature suggestion. Having real IPs in test data is not a great pattern really.

Define "real" ip addresses. For each usecase there is something to be said. If you want it strict you would need to manually provide the cidr ranges which means it gets too complex as well. And it that case its more like a 1.1.1.1 till 255.255.255.255 as well

[brother]

Still a neat feature suggestion. Having real IPs in test data is not a great pattern really.

Define "real" ip addresses. For each usecase there is something to be said. If you want it strict you would need to manually provide the cidr ranges which means it gets too complex as well. And it that case its more like a 1.1.1.1 till 255.255.255.255 as well

Real in contrast to them provided in this helper which are defined as for documentation purposes.
For the rare cases wherw you actually need a routable IP the current IP helpers are available still and would work fine.

And I understand the problem changing the default into the documentation IPs and so on, that hasn't been proposed (yet).