[Rpm-maint] arbitrary tag definition and use from the python interface

[seth vidal]

I was wondering how possible/doable it would be to support arbitrary tag
definition w/i an rpm.

so in the specfile I could do (for example)

TagDef: mytag
mytag: foovalue

Then that would get thrown into the rpm when built and when I open up
the header in rpm-python maybe I could do:

hdr.mytag
>>> 'foovalue'


How reasonable is that to consider for later versions of rpm?

-sv