BUG/MINOR: ssl_ckch: Wrong OCSP CID after modifying an SSL certficate

This bug could be reproduced with the "set ssl cert" CLI command to update
a certificate. The OCSP CID is duplicated by ckchs_dup() which calls
ssl_sock_copy_cert_key_and_chain(). It should be computed again by
ssl_sock_load_ocsp(). This may be accomplished resetting the new ckch OCSP CID
returned by ckchs_dup().

This bug may be in relation with GH #2319.

Must be backported to 2.8.

src/ssl_ckch.c

@@ -2421,6 +2421,13 @@ static int cli_parse_set_cert(char **args, char *payload, struct appctx *appctx,
 		goto end;
 	}
 
+	/* Reset the OCSP CID */
+	if (cert_ext->type == CERT_TYPE_PEM || cert_ext->type == CERT_TYPE_KEY ||
+	    cert_ext->type == CERT_TYPE_ISSUER) {
+		OCSP_CERTID_free(new_ckchs->data->ocsp_cid);
+		new_ckchs->data->ocsp_cid = NULL;
+	}
+
 	data = new_ckchs->data;
 
 	/* apply the change on the duplicate */