64-bit arithmetic and logical operations was added:
  - 32-bit fields can use 32-bit operands;
  - 64-bit fields can use 32-bit and 64-bit operands.

A fix for Bug#928222 Memory leak when running a long
stored procedure.

An original patch was prepared done by Alexey Demakov.

When running a long stored procedure, the server could
allocate a lot of memory in the fiber garbage collected
pool, when performing requests in a loop.

To fix the bug, garbage collect memory after every call to
rw_callback() from stored procedures module.

Add ptruncate() method to palloc, which rolls back
used memory to a saved position and use it in box_lua.m.

Since VALGRIND MEMPOOL API doesn't support ptruncate(),
don't use it, instead consistently use
VALGRIND_MAKE_MEM_DEFINED/VALGRIND_MAKE_MEM_UNDEFINED.

No test case since the problem is detected by a longevity
test, not a functional test.

Conflicts:
	doc/developer/developer.xml
	doc/www-data/index.html
	doc/www-data/index.ru.html

- add content
- speed up rebuild by keeping static stuff in www-data
- change the layout and stylesheet

Conflicts:
	test/box/lua.result

Update style, add comments.

Conflicts:
	CMakeLists.txt
	core/admin.m
	core/admin.rl

Extra UPDATE command tests was added.

Conflicts:
	core/CMakeLists.txt
	include/config.h.cmake
	mod/box/index.m

- release_disabled test suite ini file option support
- debug build only error-injection test, cmake build cleaner output
- tarantool server version output with build flags

A fix and a test case for Bu#929654 "
Regression with secondary HASH indexes"

Secodnary HASH indexes where skipped by build_indexes()
when starting from a snapshot.

Add a way to reserve space for as many values as necessary
and enable HASH indexes in build_indexes().

Add a test.

Now request is executing via 'exec sql' command instead of 'exec admin' and
the result is sorting in the test suite.

We didn't check whether or not Lua bindings executed correctly,
so we didn't pay attention to these problems:

luaL_Buffer was misused, and when configuration
would exceed 4K allocated on stack, this led
to lost pieces of Lua script prepared by
tarantool_lua_load_cfg().

box.on_reload_configuration() did not work correctly with
disabled spaces.

Fix the above mentioned issued and add a test.