[PATCH v2 01/N] Add default value for last argument of dump functions.

[Martin Liška]

Hello.

After fiddling with that, I decided to come up with reworked first part
of the patch and eventual translation to a more hierarchical structure
is subject for discussion.

This first patch adds default for couple of dump functions and it helps in future
to transform 0 to a TDF_NONE (or whatever we call it).

Patch can bootstrap on ppc64le-redhat-linux and survives regression tests.

Ready to be installed?
Martin
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