Pfeww. I'm tired, but now you can add refers from repo SOLV files to

Pfeww.  I'm tired, but now you can add refers from repo SOLV files to
attribute store files.  Good night.

(Like so:
% addstore bla.solv ding.attr dong.attr > bla2.solv
% dumpsolv bla2.solv
repo refers to 2 attribute stores:
ding.attr has 4 keys
  authors
  group
  keywords
  license
dong.attr has 4 keys
  authors
  keywords
  license
...
)