Created attachment 172441 [details] [review]
gst-inspect: useful factory names for uri-handlers output

Part of gst-inspect -u output currently:
elementfactory18 (read, rank 0): appsrc
elementfactory19 (write, rank 0): appsink
elementfactory5 (read, rank 0): fd
elementfactory6 (write, rank 0): fd
elementfactory7 (read, rank 256): file
elementfactory11 (write, rank 256): file

Attached patch turns it (as presumably intended) into:
appsink (write, rank 0): appsink
appsrc (read, rank 0): appsrc
filesink (write, rank 256): file
filesrc (read, rank 256): file
fdsink (write, rank 0): fd
fdsrc (read, rank 0): fd