MINOR: ssl: split config and runtime variable for ssl-{min,max}-ver

In the CLI command 'show ssl crt-list', the ssl-min-ver and the
ssl-min-max arguments were always displayed because the dumped versions
were the actual version computed and used by haproxy, instead of the
version found in the configuration.

To fix the problem, this patch separates the variables to have one with
the configured version, and one with the actual version used. The dump
only shows the configured version.
diff --git a/include/types/listener.h b/include/types/listener.h
index 997a597..b815cc3 100644
--- a/include/types/listener.h
+++ b/include/types/listener.h
@@ -140,7 +140,8 @@
 #endif
 	char *curves;	           /* curves suite to use for ECDHE */
 	char *ecdhe;               /* named curve to use for ECDHE */
-	struct tls_version_filter ssl_methods; /* ssl methods */
+	struct tls_version_filter ssl_methods_cfg; /* original ssl methods found in configuration */
+	struct tls_version_filter ssl_methods; /* actual ssl methods used at runtime */
 #endif
 };