Switch doxygen to producing svg images

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4338 43c1dc8c-776e-4df2-8ef1-6e829299be21
Remove deprecated status from sccp_handle_KeepAliveMessage

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4339 43c1dc8c-776e-4df2-8ef1-6e829299be21
Fix xhtml doxygen issues

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4340 43c1dc8c-776e-4df2-8ef1-6e829299be21
reset name/mumber of string is empty

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4341 43c1dc8c-776e-4df2-8ef1-6e829299be21
do not set number for name

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@4342 43c1dc8c-776e-4df2-8ef1-6e829299be21