RT3809: basicConstraints is critical

This is really a security bugfix, not enhancement any more.
Everyone knows critical extensions.

Reviewed-by: Dr. Stephen Henson <steve@openssl.org>

apps/openssl.cnf

diff --git a/apps/openssl.cnf b/apps/openssl.cnf
index 53c4bef..b3e7444 100644
--- a/apps/openssl.cnf
+++ b/apps/openssl.cnf
@@ -233,11 +233,7 @@
 
 authorityKeyIdentifier=keyid:always,issuer
 
-# This is what PKIX recommends but some broken software chokes on critical
-# extensions.
-#basicConstraints = critical,CA:true
-# So we do this instead.
-basicConstraints = CA:true
+basicConstraints = critical,CA:true
 
 # Key usage: this is typical for a CA certificate. However since it will
 # prevent it being used as an test self-signed certificate it is best