According to rfc2616 (http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35.1)
byte positions are inclusive:
The first-byte-pos value in a byte-range-spec gives the byte-offset of
the first byte in a range. The last-byte-pos value gives the byte-offset
of the last byte in the range; that is, the byte positions specified are
inclusive. Byte offsets start at zero.
