As a side effect, this allows compilation of literal bytevectors
("#vu8(...)"), which gets done by the generic array handling
of the GLIL->assembly compiler.
* doc/ref/api-compound.texi (Generalized Vectors): Mention bytevectors.
(Arrays, Array Syntax): Likewise.
* doc/ref/api-data.texi (Bytevectors as Generalized Vectors): New node.
* libguile/bytevectors.c (scm_i_bytevector_generalized_set_x): New.
* libguile/bytevectors.h (scm_i_bytevector_generalized_set_x): New
declaration.
* libguile/srfi-4.c (scm_i_generalized_vector_type,
scm_array_handle_uniform_element_size,
scm_array_handle_uniform_writable_elements): Add support for
bytevectors.
* libguile/unif.c (type_creator_table): Add `vu8'.
(bytevector_ref, bytevector_set): New functions.
(memoize_ref, memoize_set): Add support for bytevectors.
* libguile/vectors.c (scm_is_generalized_vector,
scm_c_generalized_vector_length, scm_c_generalized_vector_ref,
scm_c_generalized_vector_set_x): Add support for bytevectors.
* test-suite/tests/bytevectors.test ("Generalized Vectors"): New test
set.
* libguile/read.c (scm_read_bytevector): New function.
(scm_read_sharp): Add `v' case for bytevectors.
* test-suite/lib.scm (exception:read-error): New variable.
* test-suite/tests/bytevectors.test ("Datum Syntax"): New test set.
* libguile/bytevectors.c (bytevector_equal_p): New function.
* test-suite/tests/bytevectors.test ("2.3 Operations on Bytes and
Octets")["equal?"]: New test.
