Updates cptr cache defs and build so that cspace config can truly vary.
Before, I just had some CPP checks that would stop the build if the cspace depth wasn't 4, etc. So it required some manual changes. Now it should be fully automated. There are three awk scripts that generate some C code / do some calculations, and the results are plugged into some headers (that are now templates and generated by configure). I did it this way because the CPP doesn't seem powerful enough to generate variable length definitions like this (without some serious CPP hacking). Easier to use awk and then AC_SUBST the results in. If we want to make the code even faster, we could precompute some other stuff like this as well. I tested the user build, and ran multi_thrd_cap with a cspace depth of 8, and cnode table size of 8. Looked ok.
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