Update doxygen: removal of mostly old/unmaintained \lock entries, fixes for parameters, updated doxygen.cfg, moved the ChangeLog beginning to 4500 to reduce it's size

git-svn-id: https://svn.code.sf.net/p/chan-sccp-b/code/trunk@5007 43c1dc8c-776e-4df2-8ef1-6e829299be21