WL#1597: sprintf -> snprintf (cleanup)

A recent security audit pinged us for using sprintf throughout the code. We need 
to resolve issues surrounding how we handle strings. 

So:
All sprintf() should become my_snprintf().
All scanf() statements need to be scrutinized.
All defined sizes need to be defined (no assumed sizes).
We need to make sure and define strmov in a manner where it can no be overflowed.