added netscape comment: 'client authentication only'

X509v3 extensions:
    X509v3 Basic Constraints: critical
        CA:FALSE
    X509v3 Extended Key Usage:
        TLS Web Client Authentication
    Netscape Cert Type:
        SSL Client
    Netscape Comment:
        client authentication only
    X509v3 Subject Key Identifier:
        6C:1D:EF:61:4E:B6:B6:31:FA:FB:6A:90:B8:5D:03:52:00:1B:F1:C3
    X509v3 Authority Key Identifier:
        keyid:C2:E0:4B:00:B3:F0:87:DB:14:3B:4B:B6:41:18:13:BA:22:0E:D4:BA

    X509v3 Key Usage: critical
        Digital Signature, Non Repudiation

gpgsm-params-template

@@ -18,3 +18,6 @@ Extension: 2.5.29.37 n 300A06082B06010505070302
 # Netscape Cert Type:
 #   SSL Client
 Extension: 2.16.840.1.113730.1.1 n 03020780
+# Netscape Comment:
+#   client authentication only
+Extension: 2.16.840.1.113730.1.13 n 161A636C69656E742061757468656E7469636174696F6E206F6E6C79