Simplify setvar setting

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4912 43c1dc8c-776e-4df2-8ef1-6e829299be21
Add output of permithosts to 'sccp show device'. Fix setvar variables reloading

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4913 43c1dc8c-776e-4df2-8ef1-6e829299be21