- the repository contains binaries to ease compilation for windows
   users.  It specifies how to redownload these binaries.
   - spot-on is presently listed as the source code for goldbug
   at [1]https://sourceforge.net/projects/goldbug/?source=navbar .  I do
   not see the source code for goldbug in the july 2013 version of
   spot-on.
   - in july 2013, libspoton at a cursory glance appeared to be a small c
   library that used openssl and libgeoip.  I'm guessing its sole
   functionality was to save webpages to an encrypted database, but my
   guesses are usually immature.
   - libspoton in 2013 didn't have the content I would expect for a
   messenger, but it doesn't appear to have code to harm the user in any
   way.

References

   1. https://sourceforge.net/projects/goldbug/?source=navbar