	* Add usbid option to override vendorID and deviceID for a given 	  vendorID/deviceID couple in the table describing all supported 	  cameras. This allows us to quickly validate if a new cam could be 	  supported by an existing driver. 	  This requires from the camlib driver to not use the IDs directly 	  but the device name instead.
	* Add usbid option to override vendorID and deviceID for a given
	  vendorID/deviceID couple in the table describing all supported
	  cameras. This allows us to quickly validate if a new cam could be
	  supported by an existing driver.
	  This requires from the camlib driver to not use the IDs directly
	  but the device name instead.


git-svn-id: 40dd595c6684d839db675001a64203a1457e7319@4106 67ed7778-7388-44ab-90cf-0a291f65f57c

gphoto/libgphoto2.OLDMIGRATION,gphoto/libgphoto2.OLDMIGRATION,gphoto/libgphoto2.OLDMIGRATION,gphoto/libgphoto2.OLDMIGRATION