The allocated memory is not freed when returning early due to an error.

c++tools/ChangeLog:

	* resolver.cc (module_resolver::read_tuple_file): Use unique_ptr
	to ensure memory is freed before returning.

This just replies with "OK".

c++tools/ChangeLog:

	* resolver.cc (module_resolver::ModuleCompiledRequest):
	Add a simple handler.
	* resolver.h: Declare handler for ModuleCompiledRequest.

While looking at PR100731, I have noticed the copyright years are 2020-ish
only.  This patch adds it to update-copyright.py and updates those.

2021-05-25  Jakub Jelinek  <jakub@redhat.com>

contrib/
	* update-copyright.py: Add c++tools.
c++tools/
	* Makefile.in: Update copyright year.
	* configure.ac: Likewise.
	* resolver.cc: Likewise.
	* resolver.h: Likewise.
	* server.cc: Likewise.
	(print_version): Update copyright notice date.

Compiling on clang showed a couple of pessimizations.  Fixed thusly.

	libcody/
	* client.cc (Client::ProcessResponse): Remove std::move
	inside ?:
	c++tools/
	* resolver.cc (module_resolver::cmi_response): Remove
	std::move of temporary.

When breaking out the sample server from the gcc/cp directory, it lost
its check for mmap, and the sample resolver just assumed it was there.
Fixed thusly.  The non-mapping paths in module.cc weren't (recently)
excercised, and led to a signedness warning.  Finally I'd missed
c++tools's config.h.in in the gcc_update script.  There I took the
opportunity of adding a 'tools' segment of the dependency lists.

	PR bootstrap/98300
	contrib/
	* gcc_update: Add c++tools/config.h.in.
	c++tools/
	* configure.ac: Check for sys/mman.h.
	* resolver.cc: Don't assume mmap, O_CLOEXEC are available.  Use
	xmalloc.
	* config.h.in: Regenerated.
	* configure: Regenerated.
	gcc/cp/
	* module.cc: Fix ::read, ::write result signedness comparisons.

Part of our module implementation adds a sample mapper server, the
guts of which are used by the default in-process mapping of cc1plus.
Rather than add another executable to gcc/cp/, this creates a new
c++tools directory where this and any other c++ tools might live.
The toplevel changes are a subsequent commit, because ... git.

c++tools/ChangeLog:

	* Makefile.in: New.
	* config.h.in: New.
	* configure: New.
	* configure.ac: New.
	* resolver.cc: New.
	* resolver.h: New.
	* server.cc: New.