The crude loop I wrote to come up with this changeset:

  find -L package/feeds/packages/ -name patches | \
  sed 's/patches$/refresh/' | sort | xargs make

Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>

Upstream commit 90884c62 ("xl2tpd-control refactoring") introduced in
1.3.16 changed command names

The l2tp protocol handler part was from @danvd in pull request
openwrt/packages#13866

Fixes f07319d6 ("xl2tpd: bump to version 1.3.16")

Ref: https://github.com/openwrt/packages/pull/13866
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>