[SR-Users] base64 transformation

[Andreas Granig]

Hi guys

Maybe I missed something, but looks like there is no base64 
encode/decode transformation in PV, right?
I think we're going to add one, as it might be handy to do such 
transformations directly from within the config file.

One case where this could be used is that some UAs are picky in regards 
to URIs as URI params, e.g.

P-Foo: <sip:alice at example.org;x='sip:1.2.3.4:1234'>

which could be changed into

P-Foo: <sip:alice at example.org;x=c2lwOjEuMi4zLjQ6MTIzNAo=>

which might be understood more easily (although it's still just a 
work-around for broken UAs, but that's how life is).

Any objections against such a transformation?

Andreas