Only set early defaults once, regardless of how many times the

variable is set in sudoers.  This avoids running an early callback
more than once.  For example, we don't want to call cb_fqdn() if
sudo is compiled with FQDN set but sudoers has "Defaults !fqdn".

plugins/sudoers/sudoers.c

@@ -762,10 +762,6 @@ init_vars(char * const envp[])
 	debug_return_bool(false);
     }
 
-    /* Set fully-qualified domain name if specified. */
-    if (def_fqdn)
-	cb_fqdn(NULL);
-
     debug_return_bool(true);
 }