gchar* vortex_frame_get_start_message gint  channel_num,
gchar *  serverName,
gchar *  profile,
VortexEncoding  encoding,
gchar *  content_profile,
gint  profile_content_size

Creates and return an new start message using the given data.

channel_num The channel number to be used for the new start message
serverName The serverName attribute to be used for the start element.
profile The profile element to be used inside the uri value.
encoding How is encoded the profile content.
content_profile The content profile data
profile_content_size Content profile size.
new start message that have to be deallocated when the it is no longer need.