No web.xml

Servlet 3.1 allows to have web apps with no web.xml but Maven was giving me errors when trying to package the application.

I had to add this to my pom.xml:

<plugin>
  <artifactId>maven-war-plugin</artifactId>
  <version>2.6</version>
  <configuration>
    <failOnMissingWebXml>false</failOnMissingWebXml>
  </configuration>
</plugin>