[Libguestfs] RFC: arbitrary parameters for add_drive

Hi, one of the bugs we have (#1092583) is about the lack of query string for http/https URLs: there were patches about that (not merged yet), whose solution was to add a new optional argument "querystring". Another bug that I'm looking at (#1118305) is about setting initiator IQNs for iSCSI drives; a good solution IMHO would be add a new initiator-name parameter for this. Thinking more, I was realizing that keep adding more optional arguments to add_drive would make it a bit cluttered; for this, maybe a more flexible solution for this could be adding a single extra optional argument as hash-table (or list of "param=value") for all these rarely used parameters specific to different protocols. How would that look? Thanks, -- Pino Toscano