decryptcore: load the nls data

Load the nls data before the openssl will try to do it in the
capability mode.
On my machine the sa_ossl_private_decrypt is trying to do that.

MFC after:	2 weeks

sbin/decryptcore/decryptcore.c

@@ -170,6 +170,7 @@ decrypt(int ofd, const char *privkeyfile, const char *keyfile,
 		goto failed;
 	}
 
+	caph_cache_catpages();
 	if (caph_enter() < 0) {
 		pjdlog_errno(LOG_ERR, "Unable to enter capability mode");
 		goto failed;