merge master: adapt to skalibs 2.11.0.0

.gitlab-ci.yml

INSTALL.md

build_toolchain.sh

doc/upgrade.md

package/deps.mak

package/info

src/66/66-boot.c

src/66/66-hpr.c

src/66/66-inresolve.c

src/66/66-inservice.c

src/66/66-instate.c

src/66/66-intree.c

src/66/66-parser.c

src/66/66-rebuild.c

src/66/66-scanctl.c

src/66/66-scandir.c

src/66/66-shutdown.c

src/66/66-shutdownd.c

src/66/66-tree.c

src/extra-tools/66-echo.c