[LEDE-DEV] Backporting to 17.01 fixes for relayd, ppp, mac80211-hwsim, openvpn

[Yousong Zhou]

Hi, John

I'd like to push the following changes in my staging tree [1] to
lede-17.01 branch, please review and ACK/NACK. Thanks.

ef5cb96: Yousong Zhou: relayd: fix making incomplete instance json data
77fb98e: Yousong Zhou: relayd: remove old start-stop-service related code
b24273f: Yousong Zhou: ppp: ppp6-up: add executable permission bit
5f5fae2: Yousong Zhou: mac80211: hwsim: select DRIVER_11AC_SUPPORT and
DRIVER_11W_SUPPORT
2b22e1d: Brandon Koepke: openvpn: adding key_direction to append_params.

[1] https://git.lede-project.org/?p=lede/yousong/staging.git;a=shortlog;h=refs/heads/lede-17.01

                yousong