Rewrite SRFI-2 'and-let*' using syntax-case.

* module/ice-9/and-let-star.scm (%and-let*): Helper macro.
  (and-let*): Reimplement using syntax-case.
Minor stylistic improvement to 'and-let*' macro.

* module/ice-9/and-let-star.scm (%and-let*): Use 'and' instead of
  'if'.  Suggested by Chris K. Jester-Young <cky944@gmail.com>.
psyntax: cite the paper that psyntax is based on.

* module/ice-9/psyntax.scm: cite the paper.
Fix extend-request to preserve method and meta.

* module/web/client.scm (extend-request): Preserve method and meta.
web client: HTTP methods are symbols, not strings.

* module/web/client.scm (request, http-get, http-head, http-post,
  http-put, http-delete, http-trace, http-options): HTTP methods are
  symbols.
THANKS Alexandru Cojocaru

* THANKS: Add Alexandru Cojocaru to fixes section.
Improve error reporting of procedures defined by define-inlinable.

* module/ice-9/boot-9.scm (define-inlinable): Improve error reporting
  when procedures defined using 'define-inlinable' are applied to the
  wrong number of arguments.

* module/srfi/srfi-9.scm (define-tagged-inlinable): Improve error
  reporting when procedures defined using 'define-tagged-inlinable' are
  applied to the wrong number of arguments.
Adapt srfi-9.test to error reporting improvements; update copyright dates.

* module/srfi/srfi-9.scm: Add 2013 copyright date.

* test-suite/tests/srfi-9.test: Adapt to recent error reporting
  improvements to procedures defined by 'define-tagged-inlinable'.
Web client+server: Add Content-Length header for empty bodies.

* module/web/client.scm (sanitize-request): Add a Content-Length
  header if a body if given, even if the body is empty.

* module/web/server.scm (sanitize-response): Add a Content-Length
  header if a body if given, even if the body is empty.
Web: Use functional setters in extend-request and extend-response.

* module/web/client.scm (extend-request):
* module/web/server.scm (extend-response): Reimplement using
  functional setters.
Fix truncated documentation for 'put-char'.

Fixes <http://bugs.gnu.org/15152>.
Reported by Josep Portella Florit <jpf@primfilat.com>.

* doc/ref/api-io.texi (R6RS Textual Output): Fix truncated docs
  for 'put-char'.

* THANKS: Add Josep Portella Florit to fixes section.
Fix minor mistakes in documentation.

Fixes <http://bugs.gnu.org/15487>.
Reported by Josep Portella Florit <jpf@primfilat.com>.

* doc/ref/api-i18n.texi (i18n Introduction, Text Collation,
  Internationalization, Internationalization):
  LC_MESSAGE --> LC_MESSAGES.

* doc/ref/api-procedures.texi (Compiled Procedures):
  program-lambda-alist --> program-lambda-list.

* THANKS: Fix alignment of Josep Portella Florit.
Fix edge case in 'ash'.

* libguile/numbers.c (scm_ash): Fix (ash -1 SCM_I_FIXNUM_BIT-1) to
  return a fixnum instead of a bignum.

* test-suite/tests/numbers.test (ash): Add tests.
Deprecate scm_c_program_source, as it has no internal users.

* libguile/programs.c:
* libguile/programs.h:
* libguile/deprecated.h:
* libguile/deprecated.c (scm_c_program_source): Deprecate.
Revert "Fix edge case in 'ash'."

This reverts commit 8df68898b9f6ba15171244f1f3549688f13d605f.
Fix edge case in 'ash'.

* libguile/numbers.c (left_shift_exact_integer): Fix edge case where
  N is -1 and count is SCM_I_FIXNUM_BIT-1 to return the most negative
  fixnum.  Previously this result was returned as a bignum.

* test-suite/tests/numbers.test (ash): Add tests.
'scm_c_read' goes through the fast path with ISO-8859-1 unbuffered ports.

Discussed in <http://bugs.gnu.org/15368>.

* libguile/ports.c (scm_c_read): Enter the 'swap_buffer' case when
  pt->encoding is "ISO-8859-1".
doc: Update the section on SMOBs and memory management.

* doc/ref/libguile-smobs.texi (Describing a New Type): Only list 'print'
  and 'equalp' as compulsory.  Explain why 'mark' and 'free' are
  optional.
  (Creating Smob Instances): Remove paragraphs about allocations that
  might fail etc.  Use 'scm_gc_malloc_pointerless' for the pixel
  buffer.
  (Garbage Collecting Smobs): Explain when the 'mark' and 'free'
  functions are needed.
  (Garbage Collecting Simple Smobs): Remove.
Doc: mention vectors are self-quoting

Reported by Dmitry Bogatov <KAction@gnu.org>.

* doc/ref/api-compound.texi (Vector Syntax, Vector Creation): Mention
  that vectors are self-quoting. Remove examples with quote signs.
Doc: 'unfold-right' takes a tail not a tail generator.

Reported by David Kastrup <dak@gnu.org>.

* doc/ref/srfi-modules.texi (SRFI-1 Fold and Map): Change argument
  name, and default value.