set CA setting per default

letsencrypt.sh is mainly used with letsencrypt.org.

config.sh.example

@@ -1,2 +1,4 @@
-CA="https://acme-v01.api.letsencrypt.org"
+# default values are commented
+
+#CA="https://acme-v01.api.letsencrypt.org"
 WELLKNOWN="/var/www/letsencrypt/.well-known/acme-challenge"

letsencrypt.sh

@@ -4,6 +4,9 @@ set -e
 set -u
 set -o pipefail
 
+# default config values
+CA="https://acme-v01.api.letsencrypt.org"
+
 . ./config.sh
 
 umask 077 # paranoid umask, we're creating private keys