[Stox] media: mapping a=fmtp to jingle

[Philipp Hancke <[e-mail]>]

The main problem of mapping a=fmtp to jingle and vice versa is that 
jingle has assumed that fmtp is always key-value separated by colons.
See http://xmpp.org/extensions/xep-0167.html#format at the bottom of 
section 4. Several implementors apparently noticed that the text is 
wrong and created workarounds.

I suspect the reasonable advice for the gateway is to translate lines 
with key-value pairs separated by semicolons as described in XEP-0167 
and pick one of the following ways to deal with non-key-value lines:
1) map to <parameter name='' value='thestuff'/> (used by gmail afaik)
2) map to <param name='thestuff' value=''/>
3) map to <param name='attributes'>thestuff</param>
    (XEP-0293/0294 recommend something similar)

How sensitive are SDP implementations in parsing different key-value 
variants (e.g. "key=value;key2=value" vs "key=value; key2=value2"?