use set -u to catch uninitialized variables

fb1790cd · Simon Ruderich · 5fedf3b3 · fb1790cd
Commit fb1790cd authored Dec 05, 2015 by Simon Ruderich
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letsencrypt.sh letsencrypt.sh +1 -1

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--- a/letsencrypt.sh
+++ b/letsencrypt.sh
 #!/bin/bash

-set -e
+set -eu

 . ./config.sh