Increase file descriptors for router
Increase file descriptors for router

This commit increases the number of allowed file descriptors for the `router` app (which runs under the `deploy` user) from 16384 to 65535 to allow it to handle more concurrent connections.

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet