Add offline/online SCTP support

ccsrc/Framework/include/params.hh

ccsrc/Framework/src/params.cc

ccsrc/Protocols/IP/ip_offline_layer.cc

ccsrc/Protocols/IP/ip_offline_layer.hh

ccsrc/Protocols/IP/ip_offline_layer_factory.hh

ccsrc/Protocols/IP/module.mk

ccsrc/Protocols/Pcap/pcap_offline_layer.cc

ccsrc/Protocols/Sctp/module.mk

ccsrc/Protocols/Sctp/sctp_layer.cc

ccsrc/Protocols/Sctp/sctp_layer.hh

ccsrc/Protocols/Sctp/sctp_layer_factory.hh

ccsrc/Protocols/Sctp/sctp_offline_layer.cc

ccsrc/Protocols/Sctp/sctp_offline_layer.hh

ccsrc/Protocols/Sctp/sctp_offline_layer_factory.hh