Add code for supporting -p option mainly.
Merge branch 'master' of https://github.com/xkdcc/brant_sniffer

Conflicts:
	.gitattributes
	INSTALL
	Makefile
	README.md
	config.guess
	config.h.in~
	config.log
	config.status
	config.sub
	configure.scan
	depcomp
	include/Makefile
	install-sh
	lib/Makefile
	lib/common_lib/Makefile
	lib/data_struct_lib/Makefile
	lib/display_lib/Makefile
	lib/netop_lib/Makefile
	ltmain.sh
	missing
	src/Makefile