To Do List
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* rconfig.c, genlib.c: create/recall (read/write) configuration [settings]
    file, eg "rlib.prefs"

* optimizations: code size, and workarounds for broken -ss in cc 5.2a

* stkchker.c: generate code to pass frame size as longword instead of word
  * rlib_stkchk.c: stkchk() ability to take parameter via stack or register
  * rconfig.c: add selection gadget for register/stack based arg for stkchk()
