If the lookup table does not have an entry, it will just log as the raw decimal language/keyboard code. With this change, if we do not have an entry in the lookup table, we'll look at the low order / 4 least significant bits to see if we have a match. The high order / 4 most significant bits are flags/modifiers to the base language/keyboard code. We'll append that it is a "Best Guess"
(This is my first attempt at Zeek scripting, apologies upfront if I'm missing obvious language features. I feel like the const language lookup should return a success/fail return code that we would key off of, but unsure how to accomplish that so instead went for string matching on value in == value out).
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