Landsat 8 is known as "LDCM", don't know how to get into SMD.tx

I think I have to pull another dump of the Missions DB table
which should have LANDSAT 8 / LDCM in the table as an active (not
future) mission.  Then maybe I can determine that the corresponding
TLE entry should be put in SMD.txt.

See #123
Populate More links from satellite by index into satData struct.

This is evil cut-paste code and needs to be factored out.

Fixes #124