[Tilesathome] Take and Release feature

[Matthias Julius]

spaetz <osm at sspaeth.de> writes:

> Sure, a client ID would be good for identifying
> single clients, but that requires someone to implement it in the
> client.

As of r9510 the client will look up its client ID from
<WorkingDirectory>/client-id.txt or create one if that file doesn't
exist.  It will send it along as client-id when requesting a job,
putting it back or uploading it.

The client ID is a random integer from 0 to 2^31-1, but there is
nothing that prevents the user to edit client-id.txt.  The client will
send whatever is in there. 

In the case of a dedicated upload client, the client ID will be that
of the uploader and not that of the renderers.

Matthias