const char *x[] is still a variable, being an array of non-const pointers
to const chars, x[2] = anotherconststring; is still possible.
const char * const x[] is a const itself, x[2] = anotherconststring; no
longer possible. And is one indirection less when accessing the data,
because x is now the symbol of the actual data and not of the variable
keeping the address of the actual data.

REVIEW: 120326

Thanks Jarosław for review