Add a struct sudo_conv_callback that contains on_suspend and on_resume

function pointer args plus a closure pointer and at it to the
conversation function.

plugins/sudoers/auth/secureware.c

@@ -65,7 +65,7 @@ sudo_secureware_init(struct passwd *pw, sudo_auth *auth)
 }
 
 int
-sudo_secureware_verify(struct passwd *pw, char *pass, sudo_auth *auth)
+sudo_secureware_verify(struct passwd *pw, char *pass, sudo_auth *auth, struct sudo_conv_callback *callback)
 {
     char *pw_epasswd = auth->data;
     char *epass = NULL;