conf: remove control.acl item

doc/configuration.rst

doc/man/knot.conf.5in

doc/reference.rst

src/knot/conf/scheme.c

src/knot/ctl/remote.c

src/knot/updates/acl.h

src/utils/knot1to2/cf-parse.tab.c

src/utils/knot1to2/cf-parse.tab.h

src/utils/knot1to2/cf-parse.y

src/utils/knot1to2/extra.h

src/utils/knot1to2/main.c