Added example client,email certificate.

examples/example-certificates.hcl

@@ -1,6 +1,6 @@
 defaults {
     subject = "{{ .Name }}.koszewscy.waw.pl"
-    type = "server"
+    type = "server,client"
     validity = "1y"
     san = ["DNS:{{ .Name }}.koszewscy.waw.pl"]
 }
@@ -30,3 +30,10 @@ certificate "prometheus" {
     subject = "{{ .Name }}.{{ .Domain }}" # result: prometheus.koszewscy.email
     san = ["DNS:{{ .Name }}.{{ .Domain }}"] # result: [ "DNS:prometheus.koszewscy.email" ]
 }
+
+certificate "slawek" {
+    subject = "CN=Slawomir Koszewski,emailAddress=slawek@koszewscy.waw.pl,O=Koszewscy,C=PL"
+    type = "client,email"
+    validity = "1y"
+    san = ["email:slawek@koszewscy.email"]
+}