DOC: provide an example of how to use ssl_c_sha1
As suggested by Aydan Yumerefendi, a little bit of examples never hurts.
diff --git a/doc/configuration.txt b/doc/configuration.txt
index fc16843..aa55eb4 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -10793,6 +10793,10 @@
Returns the SHA-1 fingerprint of the certificate presented by the client when
the incoming connection was made over an SSL/TLS transport layer. This can be
used to stick a client to a server, or to pass this information to a server.
+ Note that the output is binary, so if you want to pass that signature to the
+ server, you need to encode it in hex or base64, such as in the example below:
+
+ http-request set-header X-SSL-Client-SHA1 %[ssl_c_sha1,hex]
ssl_c_sig_alg : string
Returns the name of the algorithm used to sign the certificate presented by