Remotely trigger an assertion on a TLS server with a malformed certificate string

**Summary:** Connecting to a NodeJS TLS server with a client certificate that has a type 19 string in its subjectAltName will crash the TLS server if it tries to read the peer certificate.

const tls = require("tls");
const fs = require("fs");

let server = tls.createServer({
    ca: fs.readFileSync("./ca.crt"),
    cert: fs.readFileSync("./server.crt"),
    key: fs.readFileSync("./server.key"),
    requestCert: true,
    rejectUnauthorized: true
}, (socket) => { …