Squid ssl cache_peer

The Squid supports cache_peer using ssl:
In downstream squid:

cache_peer parentip parent  parentport 0000 default no-query no-digest ssl  sslcert=/opt/exampleca/certs/client2.pem sslkey=/opt/exampleca/client2private.pem sslcafile=/opt/exampleca/cacert.pem name=https-local

In upstream squid:

https_port parentport cert=/opt/exampleca/certs/server.pem key=/opt/exampleca/serverprivate.pem clientca=/opt/exampleca/cacert.pem capath=/opt/exampleca crlfile=/opt/exampleca/my_crl.pem sslflags=VERIFY_CRL  sslcontext=mlroaming