[git tag 1_18_1 1/1] apply post-1.18.0 patches, bump version to 1.18.1

[Denys Vlasenko]

commit: http://git.busybox.net/busybox/commit/?id=2a1571bfa003233470140a17be4ae4f0239f5a24
branch: http://git.busybox.net/busybox/commit/?id=refs/tags/1_18_1

Signed-off-by: Denys Vlasenko <vda.linux at googlemail.com>

this is a tag, so no patch shown