[Users] adding SDP lines

[Juha Heinanen]

i noticed that if i try to add in openser.cfg file a

direction=active

sdp line using fix_nated_sdp("1") just before i call t_write_unix to
send the request to sems, sems does not get that added line.

is it so that currently there is no way to add sdp lines in the same
openser.cfg that calls t_write_sems and that adding sdp lines needs to
be done in earlier openser instance?

-- juha