Rewrite rule for fonts in nginx example configuration was broken,
to be able to replace $1 and $2 we need two matching groups (regexp).

Related discussion and test (starts with my comment from 24/Oct/2016 about 1.6.0rc): https://jira.ez.no/browse/ITSUPPORT-2981?focusedCommentId=199795&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-199795

Solution was already proposed in this PR: https://github.com/ezsystems/ezplatform/pull/127