Prevent HTTP failure spam

[bonbud-macryg]

Booting any Groundwire ship comes with the following terminal spam.

gall: booted %urb-watcher
http: fail (10, 504): connection failure
http: fail (11, 504): connection failure
http: fail (12, 504): connection failure
http: fail (13, 504): connection failure
http: fail (14, 504): connection failure
http: fail (15, 504): connection failure
http: fail (16, 504): connection failure

Maybe %urb-watcher should be turned off by default if we know the user is getting their PKI info through a sponsor?