Comment 3 for bug 1442828

In the future we need to clean up the ifupdown integration, and use something like https://people.debian.org/~biebl/ifupdown-wait-online.tar.gz to wait properly without this active shell waiting loop. (This is similar to /etc/network/if-up.d/upstart).

For vivid, an unintrusive fix is to extend the waiting loop to wait until all /run/network/ifup-*.pid files are gone, i. e. to wait until ifup is done, not just wait until all of them have started.