include/radiusd.h

	include/radiusd.h
	removed char username[], and rename VP *name to VP*username

	include/modules.h
	removed explicit references to username && password from
	function prototypes & structure definitions.

	main/radiusd.c
	removed unused variable.

	main/auth.c
	clean ups.

	modules/rlm_preprocess
	modules/rlm_pam
	modules/rlm_unix
	Use request->username && request->password, instead of being
	passed char* pointers.