A number of commercial operating systems (solaris, sgi, possibly more)
support the long long datatype and have library functions that operate
on them.

Although NetBSD users can get the same effect in their programs by
using quad_t's and quad versions of those functions, I think it may be
worthwile to provide long long support for portability.

These are what I had in mind:

	Add %ll support in vfprintf() and vfscanf().

	Add strtoll() (calls strtoq).
	Add strtoull() (calls strtouq). 

	Add qdiv() and lldiv().

Thoughts?

	--jtc