[CLEANUP] config: use build_acl_cond() to simplify http-request ACL parsing

Now that we have this new function to make your life better, use it.
diff --git a/include/proto/auth.h b/include/proto/auth.h
index 9808621..7385ab0 100644
--- a/include/proto/auth.h
+++ b/include/proto/auth.h
@@ -20,7 +20,7 @@
 
 struct userlist *auth_find_userlist(char *name);
 unsigned int auth_resolve_groups(struct userlist *l, char *groups);
-struct req_acl_rule *parse_auth_cond(const char **args, const char *file, int linenum, struct list *known_acl, int *acl_requires);
+struct req_acl_rule *parse_auth_cond(const char **args, const char *file, int linenum, struct proxy *proxy);
 void userlist_free(struct userlist *ul);
 void req_acl_free(struct list *r);
 int acl_match_auth(struct acl_test *test, struct acl_pattern *pattern);