There are quite a few bugfixes in the version of the ACME package in
master, and the old version in 18.06 have some issues as seen in #10328.
This commit ports over all changes from the master branch in one go.
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
For configurations where another web server is running on port 80, running
acme.sh in standalone mode fails. Try to detect this and refuse to run; and
allow the user to configure a webroot directory to use the running webserver for
certificate verification.
This also updates acme.sh to the latest version.
Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk>