check for scp + no server and have print outs for servers

examples/echoserver/echoserver.c

@@ -839,6 +839,8 @@ THREAD_RETURN WOLFSSH_THREAD echoserver_test(void* args)
 #endif
 #ifndef NO_WOLFSSH_SERVER
         echoserver_test(&args);
+#else
+        printf("wolfSSH compiled without server support\n");
 #endif
 
         wolfSSH_Cleanup();

examples/server/server.c

@@ -735,6 +735,8 @@ THREAD_RETURN WOLFSSH_THREAD server_test(void* args)
 
 #ifndef NO_WOLFSSH_SERVER
         server_test(&args);
+#else
+        printf("wolfSSH compiled without server support\n");
 #endif
 
         wolfSSH_Cleanup();

wolfssh/settings.h

@@ -56,6 +56,10 @@ extern "C" {
     #endif
 #endif
 
+#if defined(WOLFSSH_SCP) && defined(NO_WOLFSSH_SERVER)
+    #error only SCP server side supported
+#endif
+
 #ifdef __cplusplus
 }
 #endif