Invalid partial content requests possible with start byte = resource-byte-count

[gbrehmer]

Spring Boot 2.1.7 / Spring Framework 5.1.9

Because ResourceRegion (HttpRange.toResourceRegion) allows regions with a length of 0, it is possible to request the following range.

Range: bytes=<resource_byte_count>-

This will return the following invalid Content-Range Header:

Content-Range: length-(length_minus_1)/length

For example:
Content-Range: 37623133-37623132/37623133

Length: 0 Bytes

Such a request should return 416 like other requests outside of the valid range