Support older bash releases
Support older bash releases

Bash 3.0 and others seem to have serious issues running dehydrated.
https://github.com/lukas2511/dehydrated/issues/284 tracks the
problem but got closed as it seems too hard to support "stone age"
distributions.

Turns out it is actually only a three line change. ;-)

lukas2511/letsencrypt.sh,dennisschuerholz/dehydrated,lukas2511/dehydrated,Rayne/letsencrypt.sh,ahnooie/dehydrated,erorus/letsencrypt.sh