Trying to connect to an unreachable host doesn't always throw an error

[fbernhard]

This code should also check for "EHOSTUNREACH":

node-ari-client/lib/client.js

Line 113 in 0933f88

['ETIMEDOUT', 'ENOTFOUND', 'ECONNREFUSED'].indexOf(err.code) !== -1) {

if request throws an "EHOSTUNREACH" the system continues with the connection attempt which leads the library to "hang".

https://nodejs.org/api/os.html#os_signal_constants

Alternatively, maybe check for statusCode 200?

request(ariUrl, function (err, response) {
      if (err || !response || response.statusCode !== 200) {

Thank you!