AW: Cleaning up include file inconsistencies

[Dr. Matthias St. Pierre]

> Having such a finegrained distinction is not the problem, but (at least to me)
> it is not entirely clear which include file goes into which directory.

Note: the high score seems to lie at four different header files for the same package,
not counting the generated error header file:

	~/src/openssl$ find -name 'store*.h'

	./crypto/store/store_locl.h
	./crypto/include/internal/store.h
	./crypto/include/internal/store_int.h
	./include/openssl/store.h
	./include/openssl/storeerr.h

Matthias