It is possible to define the field "act_rule.check_ptr" if you want to check the
validity of a tcp/http rule.
short deny_status; /* HTTP status to return to user when denying */
enum act_return (*action_ptr)(struct act_rule *rule, struct proxy *px, /* ptr to custom action */
struct session *sess, struct stream *s, int flags);
+ int (*check_ptr)(struct act_rule *rule, struct proxy *px, char **err); /* ptr to check function */
struct action_kw *kw;
struct applet applet; /* used for the applet registration. */
union {