Removed button_modes struct, because it is never used anywhere

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4724 43c1dc8c-776e-4df2-8ef1-6e829299be21
Fix cli:sccp config generate, to accept arbitrairy file name

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4725 43c1dc8c-776e-4df2-8ef1-6e829299be21