replace misleading "stack overflow" message on call depth limit
replace misleading "stack overflow" message on call depth limit

The new error message looks like this:
"Error: call depth limit reached in a debug build (2000 function calls).
You can change it with -d:nimCallDepthLimit=<int> or switch to a release
build with -d:release."

dom96/Nim,dom96/Nim,dom96/Nim,dom96/Nim,dom96/Nim,dom96/Nim,dom96/Nim