[sr-dev] msilo generated messages should not include Contact header

[Juha Heinanen]

i noticed that msilo generated messages include a Contact header such
as:

Contact: <sip:jh at test.fi>;msilo=yes

according to rfc3428.txt this is wrong:

MESSAGE requests do not initiate dialogs.  User Agents MUST NOT
   insert Contact header fields into MESSAGE requests.

if no one objects, i'll fix msilo module accordingly, i.e., remove
contact header from msilo generated messages.

-- juha