add option and description

Signed-off-by: Paul Schroeder <milkpirate@users.noreply.github.com>

example.cfg

@@ -60,6 +60,8 @@ listen:
 #   fork: Should a new process be forked for this protocol?
 #         (only useful for sslh-select)
 #   tfo_ok: Set to true if the server supports TCP FAST OPEN
+#   resolve_on_forward: Set to true if server address should be resolved on
+#         (every) incoming connection (again)
 #   transparent: Set to true to proxy this protocol
 #         transparently (server sees the remote client IP
 #         address). Same as the global option, but per-protocol

sslhconf.cfg

@@ -108,8 +108,10 @@ config: {
                     { name: "fork"; type: "bool"; default: false },
                     { name: "tfo_ok"; type: "bool"; default: false;
                         description: "Set to true if this protocol supports TCP FAST OPEN" },
-                    { name: "transparent"; type: "bool"; default: false; 
+                    { name: "transparent"; type: "bool"; default: false;
                         description: "Set to proxy this protocol transparently" },
+                    { name: "resolve_on_forward"; type: "bool"; default: false;
+                        description: "Set to true if server address should be resolved on (every) incoming connection (again)" },
                     { name: "log_level"; type: "int"; default: 1 },
                     { name: "keepalive"; type: "bool"; default: false },
                     { name: "sni_hostnames",