fix https://github.com/Neilpang/acme.sh/issues/614

acme.sh

@@ -994,7 +994,7 @@ _readKeyLengthFromCSR() {
     echo "$_outcsr" | _egrep_o "^ *ASN1 OID:.*" | cut -d ':' -f 2 | tr -d ' '
   else
     _debug "RSA CSR"
-    echo "$_outcsr" | _egrep_o "^ *Public-Key:.*" | cut -d '(' -f 2 | cut -d ' ' -f 1
+    echo "$_outcsr" | _egrep_o "^ *Public.Key:.*" | cut -d '(' -f 2 | cut -d ' ' -f 1
   fi
 }