The CONTRIBUTING.md requests an (or multiple) SPDX identifier for GPL
licenses. But a lot of packages did use a different, non-SPDX style with a
"+" at the end instead of "-or-later".

Signed-off-by: Sven Eckelmann <sven@narfation.org>

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

fix Makefile chmod (644)
replace MD5SUM with HASH
add PKG_MIRROR_HASH when PKG_SOURCE_PROTO:=git

(PKG_SOURCE_PROTO:=svn tarballs are not reproducible for now)

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>

Signed-off-by: Steven Barth <steven@midlink.org>

Signed-off-by: Jeff Waugh <jdub@bethesignal.org>

- libkmod for programmatic control of Linux modules
- kmod for administrative control of Linux modules,
  symlinks for the familiar module-init-tools suite

Signed-off-by: Jeff Waugh <jdub@bethesignal.org>