CUPS printing support

[Antoine Martin]

This bug is just a big tracker bug for all things related to printing.
Looks like we may need (at least for MS Windows clients... sigh) to start a CUPS server for each session (or is it for each client??):
​http://www.cups.org/documentation.php/doc-1.4/ref-client-conf.html

To deal with multiple remote users connected to the same user account (as there is only one

.cups/client.conf

)

we should be able to use the CUPS_SERVER environment variable for that:
​http://ait.web.psi.ch/services/linux/guides/system/cups/local_cups_server/
but it doesn't seem to do what it is supposed to do...

Maybe we need an IP per cups forward? (if we can't set the port number)