Add --debug option to kgetcred

lib/krb5/libkrb5-exports.def.in

@@ -574,6 +574,7 @@ EXPORTS
 	krb5_sendto_kdc
 	krb5_sendto_kdc_flags
 	krb5_set_config_files
+	krb5_set_debug_dest
 	krb5_set_default_in_tkt_etypes
 	krb5_set_default_realm
 	krb5_set_dns_canonicalize_hostname

lib/krb5/log.c

@@ -514,3 +514,21 @@ _krb5_have_debug(krb5_context context, int level)
 	return 0 ;
     return 1;
 }
+
+KRB5_LIB_FUNCTION krb5_error_code KRB5_LIB_CALL
+krb5_set_debug_dest(krb5_context context, const char *program,
+                    const char *log_spec)
+{
+    krb5_error_code ret;
+
+    if (context->debug_dest == NULL) {
+        ret = krb5_initlog(context, program, &context->debug_dest);
+        if (ret)
+            return ret;
+    }
+
+    ret = krb5_addlog_dest(context, context->debug_dest, log_spec);
+    if (ret)
+        return ret;
+    return 0;
+}

lib/krb5/version-script.map

@@ -567,6 +567,7 @@ HEIMDAL_KRB5_2.0 {
 		krb5_sendto_kdc;
 		krb5_sendto_kdc_flags;
 		krb5_set_config_files;
+		krb5_set_debug_dest;
 		krb5_set_default_in_tkt_etypes;
 		krb5_set_default_realm;
 		krb5_set_dns_canonicalize_hostname;