This fixes that the .info file is sometimes not written when nothing
changed in the db file.
This fixes that the info file with .1.info extension is reused again
and again, effectively reducing the usefulness of the snapshots.
This only really affects the indexer as pruning avoids this most
of the time.
Closes issue flowee-issues#6
The reason there are no standard library versions of lock-free
containers is because you want to always take full advantage of
the details in question.
In this case (read millions of times for each modification) it makes
no sense to use anything other than a standard container, but put in
a copy-on-write block. Simple and easy.
Duplicate the test_bitcoin file into the common dir,
I hope to remove the original in future.
Make the common dir a new static lib and create a new
qtestlib based unit test out of the old doublespend unit test.
John Galt
tomFlowee