Bug Fix: line->dndmode should not default to global->dnd (Reported by Pavel). Enhancement: renamed global dnd to dndFeature to clarify use as boolean.

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@5574 43c1dc8c-776e-4df2-8ef1-6e829299be21