This is only part of the solution, we still need to update joy.h and
KEYWORDS.txt when defs.txt changes, and we need to handle names that
have non-C-identifier characters in them.
But it's a start...
We check terms to see if they're in the wordlist, if they are we reuse
the string from the wordlist instead of allocating a new one.
(I've always wanted to use Gperf so I'm pretty stoked about this!)
Simon Forman