Add the source and destination ports to the protobuf msg

[rgacogne]

Short description

• for all protobuf messages in dnsdist ;
• for incoming queries / outgoing responses in the recursor.

Checklist

I have:

• read the CONTRIBUTING.md document
• compiled this code
• tested this code
• included documentation (including possible behaviour changes)
• documented the code
• added or modified regression test(s)
• added or modified unit test(s)

[omoerbeek]

Looks good. If I see things correctly, protobuf receivers using the old definition will not be hindered by this, right?
If so, I like to include this in rec-4.3.0-beta2

[rgacogne]

Looks good. If I see things correctly, protobuf receivers using the old definition will not be hindered by this, right?

They will just ignore the new fields, yes.

If so, I like to include this in rec-4.3.0-beta2

Fine by me! :-)