header (C) fixes
Automated rebranding to Oracle copyright/license strings via filemuncher
intnet, VBoxNet*, network device & drivers: GSO preps.
*: s/RT_\(BEGIN|END\)_DECLS/RT_C_DECLS_\1/g
Devices: __BEGIN_DECLS -> RT_BEGIN_DECLS; __END_DECLS -> RT_END_DECLS.
Share the code writing the pcap files.