xvine:bug fix


git-svn-id: https://gnunet.org/svn/gnunet@33774 140774ce-b5e7-0310-ab8b-a85725594a96
-removing global state from UDP plugin (statics), doxygen, indentation, starting support for monitoring

git-svn-id: https://gnunet.org/svn/gnunet@33775 140774ce-b5e7-0310-ab8b-a85725594a96
adding monitoring support to UDP plugin, plus some doxygen/indentation fixes

git-svn-id: https://gnunet.org/svn/gnunet@33776 140774ce-b5e7-0310-ab8b-a85725594a96
make myoptions member of 'struct Plugin' instead of a global

git-svn-id: https://gnunet.org/svn/gnunet@33777 140774ce-b5e7-0310-ab8b-a85725594a96