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These might be useful from applications.

Some python code seem to manage to stuff this at import time.
We have to live with it.

Rather try without, and if selection is
ambiguous, try again with the current host.

The api.freeze_operation also now accepts an explicit
host.

This should give us correct timestamps.

However something more sophisticated will have to be done,
as only simple scenarii will be handled by this.


Closes #51.

Closes #50.

A bit of terminology tightening cannot hurt.

Lookup is done using the REWORKCFGPATH env var,
then the current working directory and the home directory
are searched. A `rework.cfg` file, if found, must contain:

 [dburi]
 <name> = <a-db-uri>

We want to make sure the trailing unflushed things are sent to the
logs.