kinit with expired password fails, patch

[Greg Hudson]

Here's the fix I plan to use.  Can you let me know if it works in your
test scenario?
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diff --git a/src/lib/krb5/krb/preauth2.c b/src/lib/krb5/krb/preauth2.c
index 06a135a..5bc8308 100644
--- a/src/lib/krb5/krb/preauth2.c
+++ b/src/lib/krb5/krb/preauth2.c
@@ -281,6 +281,7 @@ krb5_preauth_request_context_init(krb5_context context)
     if (context->preauth_context == NULL)
         return;
     for (i = 0; i < context->preauth_context->n_modules; i++) {
+        context->preauth_context->modules[i].use_count = 0;
         mod = &context->preauth_context->modules[i];
         if (mod->client_req_init != NULL)
             mod->client_req_init(context, mod->moddata, mod->modreq_p);