environment parsing was removed from LibreSSL's libraries.

--- examples/generate-csr.sh.orig	Thu May 12 01:42:39 2016
+++ examples/generate-csr.sh	Fri May 27 10:39:54 2016
@@ -17,7 +17,11 @@ do
   domains="$domains,DNS:$x"
 done
 
-SAN="$domains" openssl req -config "${OPENSSL_CNF:-openssl.cnf}" \
+_config=${OPENSSL_CNF:-openssl.cnf}
+_conftemp=`mktemp /tmp/generate-csr.cnf.XXXXXXXX` || exit 1
+sed "s%\${ENV::SAN}%$domains%" < $_config > $_conftemp
+
+openssl req -config "$_conftemp" \
   -new -nodes -subj '/' -reqexts san \
   -out "${CSR_PATH:-csr.der}" \
   -keyout "${KEY_PATH:-key.pem}" \
@@ -25,4 +29,5 @@ SAN="$domains" openssl req -config "${OPENSSL_CNF:-ope
   -outform DER
 # 512 or 1024 too low for Boulder, 2048 is smallest for tests
 
+echo rm $_conftemp
 echo "You can now run: certbot auth --csr ${CSR_PATH:-csr.der}"