IdenTrust cross-signed LE's intermediates, but LE's page explains the situation
better, and provides both the IdenTrust cross-signed cert, and the ISRG Root X1
signed one.
I'm not entirely sure this is particularly important, but PRing for discussion.
For most clients this should be sufficient. If not, you can download the root
certificate from
-[IdenTrust](https://www.identrust.com/certificates/trustid/root-download-x3.html).
+[LetsEncrypt](https://letsencrypt.org/certificates/).
Client SSL certificates are also supported, and may be used for identification
to services. See [this kb article](kb/using/certfp). If you have connected with