Replace unsafe C functions like strcpy with safer alternatives #557
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Resolves #556
So far I'm just replacing strcpy and sprintf (using snprintf to replace both), but there are others I'd like to replace as well.
Just starting with this because I'd like to be corrected on mistakes I'm making now, before I continue.
I'm able to compile and run with these changes, but maybe there's something I should be testing that I'm not. Please do let me know.