* src/conf_post.h (HAS_ATTRIBUTE):
* src/emacs-module.h.in (EMACS_ATTRIBUTE_NONNULL):
Port to clang 3.4 and earlier.

Run "TZ=UTC0 admin/update-copyright".

* src/emacs-module.h.in (EMACS_ATTRIBUTE_NONNULL):
Also do the nonnull check with GCC.  (The old code did the
check with Clang but not with GCC.)

In C++17, 'noexcept' is part of a function type and may be used in
typedef declarations, see
https://en.cppreference.com/w/cpp/language/noexcept_spec.

* src/emacs-module.h.in: Mark function pointer type aliases as
'noexcept' in C++17.

* src/emacs-module.h.in: Remove 'noexcept' from function pointer type
aliases.  It is illegal there in C++11, see
https://en.cppreference.com/w/cpp/language/noexcept_spec.

* src/module-env-28.h: Add new module environment functions to
module environment for Emacs 28.

* src/emacs-module.h.in: Document that 'emacs_finalizer' also works
for function finalizers.

* src/emacs-module.c (CHECK_MODULE_FUNCTION): New function.
(struct Lisp_Module_Function): Add finalizer data member.
(module_make_function): Initialize finalizer.
(module_get_function_finalizer)
(module_set_function_finalizer): New module environment functions.
(module_finalize_function): New function.
(initialize_environment): Initialize new environment functions.

* src/alloc.c (cleanup_vector): Call potential module function
finalizer during garbage collection.

* test/data/emacs-module/mod-test.c (signal_error): New helper
function.
(memory_full): Use it.
(finalizer): New example function finalizer.
(Fmod_test_make_function_with_finalizer)
(Fmod_test_function_finalizer_calls): New test module functions.
(emacs_module_init): Define them.

* test/src/emacs-module-tests.el (module/function-finalizer): New unit
test.

* doc/lispref/internals.texi (Module Functions): Document new
functionality.
(Module Misc): Move description of 'emacs_finalizer' type to 'Module
Functions' node, and add a reference to it.

* etc/NEWS: Mention new functionality.

186152ba40 Pacify gcc -Wunused-function on Ubuntu 18.04.3
4cd143aded Fix copyright years by hand
365e01cc9f Update copyright year to 2020
cd2c156163 ; * etc/NEWS: Make the description of XDG fallback more ac...

# Conflicts:
#	etc/NEWS
#	etc/refcards/ru-refcard.tex

Run "TZ=UTC0 admin/update-copyright $(git ls-files)".

Previously module authors had to define type aliases for module
functions and finalizers themselves.  This commit adds and documents
aliases so that this is no longer necessary.

* src/emacs-module.h.in: Add 'emacs_function' and 'emacs_finalizer'
type aliases.

* src/emacs-module.c: Remove old 'emacs_subr' and 'emacs_finalizer'
type aliases.
(struct Lisp_Module_Function, module_make_function): Switch from
'emacs_subr' to 'emacs_function'.

* doc/lispref/internals.texi (Module Functions): Document and use
'emacs_function' type alias.
(Module Values): Document 'emacs_finalizer' type alias.

* etc/NEWS: Mention change.

ca6a53d3bc Don't default to showing X-Faces externally in Gnus
dbf4b5b2d0 Fix manual typo in Special Read Syntax
a9fe6dfa90 Fix problem with emacs -nw / eww / svg
0de63092c8 Clarify base64 requirements and say what {en,de}code_codin...
6184aa003f ; * etc/NEWS: Fix boring oddities.
51ea32dd12 * src/emacs-module.h.in: Add reference to manual.
75d0cef20d Trivial docstring fixes
ee12c421b6 imagemagick-types needs to initialize ImageMagick

# Conflicts:
#	etc/NEWS