[xml] xmlURIUnescapeString doesn't translate spaces?

[Guy Finney <gfinney symmetry-health com>]

I'm using xmlURIUnescapeString() to successfully translate most of the
things sent from a browser which might have %XX replacements in them,
but find that it doesn't translate between '+' and a space. I wasn't
sure if this was intentional, as my understanding was that it was
included in the same translation rules. %20 will, of course, be
translated correctly, but is the '+' replacement I'm seeing in some
requests & form submissions a browser quirk or part of the standard?

-- 
Guy Finney
webmaster symmetry-health com
602-840-1910 x107