added openmp sort for avl tree index initialization
New Debian snapshot.
Add conflict/replaces tags for -module packages.
Update debian policy Standards-Version.
Update debian/copyright: base64.*.
Merge remote-tracking branch 'origin/openmp-avl-tree-index-sort' into stable
Ignore _text/download.md
fixed include paths in avl unit test
Merge remote-tracking branch 'origin/openmp-avl-tree-index-sort' into stable
Merge remote-tracking branch 'origin/stable'

Conflicts:
	.gitignore
	cmake/BuildMisc.cmake
	cmake/compiler.cmake
	include/avl_tree.h
	src/box/avl_tree_index.h
	test/unit/avl_tree.c
	third_party/qsort_arg_mt.c