Look at servers->dynamiclookuparg for deciding if a server is dynamic.

The dynamiclookupcommand member of the _config_ of the server is being
set to NULL when it's copied in confserver_cb(), resulting in dynamic
discovery being done for realms that already have a server.

Patch from Fabian Mauchle.

Addresses RADSECPROXY-69.

ChangeLog

+Unreleased 1.6.9
+	Bug fixes:
+	- Avoid creating another dynamic server when we already have one
+	working (RADSECPROXY-69). Patch by Fabian Mauchle.
+
 2016-09-21 1.6.8
 	Bug fixes:
 	- Stop waiting on writable when reading a TCP socket.

radsecproxy.c

@@ -777,10 +777,14 @@ int hasdynamicserver(struct list *srvconfs) {
 
     for (entry = list_first(srvconfs); entry; entry = list_next(entry))
 #if defined ENABLE_EXPERIMENTAL_DYNDISC
+        /* NOTE: This should probably be servers->dynamiclookuparg,
+         * like in !ENABLE_EXPERIMENTAL_DYNDISC, but we're not
+         * touching this code any more. It shouldn't be used and it's
+         * going away. */
         if (((struct clsrvconf *)entry->data)->dynamiclookupcommand
             || ((struct clsrvconf *)entry->data)->servers->in_use)
 #else
-        if (((struct clsrvconf *)entry->data)->dynamiclookupcommand)
+        if (((struct clsrvconf *)entry->data)->servers->dynamiclookuparg)
 #endif
 	    return 1;
     return 0;