Align shell style all over the repo

utils/scripts/gen-ec-cert.sh

@@ -1,4 +1,15 @@
 #!/bin/sh
+# env
+# Written in 2020 by Lucas
+# CC0 1.0 Universal/Public domain - No rights reserved
+#
+# To the extent possible under law, the author(s) have dedicated all
+# copyright and related and neighboring rights to this software to the
+# public domain worldwide. This software is distributed without any
+# warranty. You should have received a copy of the CC0 Public Domain
+# Dedication along with this software. If not, see
+# <http://creativecommons.org/publicdomain/zero/1.0/>.
+
 usage()
 {
 	printf "Usage: %s [-c curve] [-d days] domain\n" "${0##*/}" >&2
@@ -28,7 +39,7 @@ shift $((OPTIND - 1))
 domain=$1
 
 if [ -f "$domain.key" ]; then
-	printf "%s: key for %s already exists; reusing it.\n" \
+	printf "%s: key for %s already exists; reusing it\n" \
 	    "${0##*/}" "$domain" >&2
 else
 	(umask 0377 &&