Click: #include change

[Eddie Kohler]

Hi all,

Previously, you guys would start every element-related .cc file with the
following boilerplate:

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <click/config.h>
#include <click/package.hh>

Please do not do that any more. Instead, use this shorter boilerplate:

#include <click/config.h>
#include <click/package.hh>

All the elements in the MIT repositories have been changed.

love,
ed