grails/grails-doc — pull request #210 by ranterle (2014-05-30 08:25:11+00:00)
Title: Document the new Servlet API requirements in Grails 2.4

As @graemerocher mentioned in [GRAILS-11450](https://jira.grails.org/browse/GRAILS-11450) Grails 2.4 requires Servlet API 3.0 and above.
I didn't see this anywhere in the docs, so I added this.