Just throw all the main arguments for syslink() into syslink_info and

Just throw all the main arguments for syslink() into syslink_info and
pass the structure.  Do not pass the descriptor separately, do not pass
a pointer to the structure size (just pass the size directly).  The
search routines just return one structure at a time so a return size
field is not needed.

Start revamping syslink() to make it more mbuf-centric.  This work is
very much still in progress.