Added dnd_state, dnd_feature to SCCPDEVICE appfunctions

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4434 43c1dc8c-776e-4df2-8ef1-6e829299be21
Updated dnd_state for SCCPDEVICE appfunctions

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4435 43c1dc8c-776e-4df2-8ef1-6e829299be21
Added new version of sccp_channel_find_on_device_bypassthrupartyid

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4436 43c1dc8c-776e-4df2-8ef1-6e829299be21