Allow optional "NEW" in CSR header and footer

When generating a CSR in Windows it seems to create a CSR header that looks like "-----BEGIN NEW CERTIFICATE REQUEST-----", but the addition of "NEW" breaks the parsing of the CSR. Making "NEW " optional fixes the problem.

Apparently certbot is tolerant of both forms, see: https://community.letsencrypt.org/t/error-parsing-certificate-request-resolved/40039/6 for more information.

acme.sh

@@ -80,8 +80,8 @@ NGINX="nginx:"
 NGINX_START="#ACME_NGINX_START"
 NGINX_END="#ACME_NGINX_END"
 
-BEGIN_CSR="-----BEGIN CERTIFICATE REQUEST-----"
-END_CSR="-----END CERTIFICATE REQUEST-----"
+BEGIN_CSR="-----BEGIN [NEW ]\{0,4\}CERTIFICATE REQUEST-----"
+END_CSR="-----END [NEW ]\{0,4\}CERTIFICATE REQUEST-----"
 
 BEGIN_CERT="-----BEGIN CERTIFICATE-----"
 END_CERT="-----END CERTIFICATE-----"