-echo "WARNING: There is a known bug in this function.
-This function has been known to occasionally revoke the wrong hostname.
-Please see the following bug report for more information:
-https://labs.riseup.net/code/issues/show/422" >&2
-printf "Are you sure you would like to proceed? (y/N) " >&2
-read OK; OK=${OK:=N}
-if [ ${OK/y/Y} != 'Y' ] ; then
- failure "aborting."
-fi
-