Allowing commas in multiValue values

[ksmithut]

I have a use case where one of the multivalue values I'm trying to test has a comma in it. Specifically, I'm following some Shibboleth spec for affiliations where the affiliation attribute value looks like this: eduPersonAffiliation=student,eduPersonOrgDN=org
And there can be multiple values in that format. Any thoughts on how that can be supported? I'd be fine with it if all I need to do is encode the comma in some way that can still be seen as a comma on the receiving end. So If I need to encodeURIComponent or something, I would be fine with that.