Reduce debug logging when using sendDynamicDisplayNotify

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4232 43c1dc8c-776e-4df2-8ef1-6e829299be21
Show callwaiting interval in sccp show globals

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4233 43c1dc8c-776e-4df2-8ef1-6e829299be21