Changes from 2.4.3 to 2.5.0

• Fixed a nasty bug that prevented retriving data correctly with large super-chunks (> 2^31 elements).

• Fixed an issue in blosc2_schunk_get_slice_buffer() in the interpretation of the stop param.
  Now stop is not part of the selected slice (as advertised).

• Now blosc2_create_cctx() supports the same environment variables than blosc2_compress().

• Now blosc2_create_dctx() supports the same environment variables than blosc2_decompress().

• Added support for the split mode to be serialized in cframes/sframes.

• A new splitmode field has been added to the blosc2_schunk structure.

• Changed some fields in blosc2_preparams and blosc2_postparams structs:

  • in -> input
  • out -> output
  • out_size -> output_size
  • out_typesize -> output_typesize
  • out_offset -> output_offset
    This was needed to allow Cython to map the fields (in is a reserved word in Python).

• Disabled maskout reads in blosc2_schunk_get_slice_buffer() as they are not faster than getitem there.

• Add an intermediate block size in its automatic calculation based on clevel.