softethervpn: updated to 4.25-9656

Signed-off-by: Federico Di Marco <fededim@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: fededim@gmail.com

sstp-client: updated to 1.0.11 and moved under VPN submenu

Signed-off-by: fededim@gmail.com

The conffiles definition in Makefile should not contain leading whitespace.
Remove whitespace from Makefile of motion, dnscrypt-proxy and sstp-client.

Reference to discussion at #2652

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>

- Ship a `net/ppp_defs.h` replacement header since musl does not provide one
   but `pppd/pppd.h` provided by pppd is needing it.
 - Add missing `sys/types.h` includes

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>

Signed-off-by: Federico Di Marco <fededim@gmail.com>

Signed-off-by: Federico Di Marco <fededim@gmail.com>