add support for archlinux

archlinux has ca certificates in different place than Fedora

cipherscan

@@ -9,6 +9,9 @@ DOBENCHMARK=0
 BENCHMARKITER=30
 OPENSSLBIN="$(dirname $0)/openssl"
 CACERTS=${CACERTS:-/etc/pki/tls/certs/ca-bundle.crt}
+if [ ! -e "$CACERTS" ]; then
+    CACERTS="/etc/ssl/certs/ca-certificates.crt"
+fi
 if [ ! -e "$CACERTS" ]; then
     echo "Warning: CA Certificates not found at $CACERTS, export CACERTS variable with location of your trust anchors" 1>&2
 fi