MPR#7652: Restore accidentally hidden functions in misc.h
MPR#7652: Restore accidentally hidden functions in misc.h

These compatibility aliases were accidentally moved into CAML_INTERNALS in GPR#71.

gerdstolpmann/ocaml,gerdstolpmann/ocaml,gerdstolpmann/ocaml,gerdstolpmann/ocaml,gerdstolpmann/ocaml