octoprint: fix webcam snapshot URL
octoprint: fix webcam snapshot URL

The streaming URL *must* be relative while the snapshot URL *must* be
absolute. Since it's only used internally by octoprint point it to
localhost.

Signed-off-by: Koen Kooi <42e3d96910f922bdd7dd1805fe3f8aff634f391d@dominion.thruhere.net>

koenkooi/meta-maker