config: stop filtering out non-ipv4 addresses from local-addrs (npm#35)

Fixes: npm#986
PR-URL: npm#35
Credit: @valentin2105
Reviewed-By: @zkat

lib/config/defaults.js

@@ -306,8 +306,6 @@ exports.types = {
   key: [null, String],
   'legacy-bundling': Boolean,
   link: Boolean,
-  // local-address must be listed as an IP for a local network interface
-  // must be IPv4 due to node bug
   'local-address': getLocalAddresses(),
   loglevel: ['silent', 'error', 'warn', 'notice', 'http', 'timing', 'info', 'verbose', 'silly'],
   logstream: Stream,
@@ -388,16 +386,9 @@ function getLocalAddresses () {
     interfaces = {}
   }
 
-  return Object.keys(interfaces).map(function (nic) {
-    return interfaces[nic].filter(function (addr) {
-      return addr.family === 'IPv4'
-    })
-      .map(function (addr) {
-        return addr.address
-      })
-  }).reduce(function (curr, next) {
-    return curr.concat(next)
-  }, []).concat(undefined)
+  return Object.keys(interfaces).map(
+    nic => interfaces[nic].map(({address}) => address)
+  ).reduce((curr, next) => curr.concat(next), []).concat(undefined)
 }
 
 exports.shorthands = {