Hi Brent,
Glad you found the wiki helpful. As you travel down this path, please
edit that wiki page directly and add your changes. That's how we can
keep these instructions uptodate. I see you are pointing out what is
missing in that document, and others have helped you, so it will be very
An update.
ESRI has decided not to follow the standard and has closed the bug, NIM104744,
we submitted about not decoding a plus symbol ‘+’ to a space. Their solution
is for everyone else to encode all spaces as %20 and to ignore
http://tools.ietf.org/html/rfc3986. They have closed the bug