def_realm.c (krb5_get_default_realm), get_krbhst.c

def_realm.c (krb5_get_default_realm), get_krbhst.c
	(krb5_get_krbhst), hst_realm.c (krb5_get_host_realm),
	init_os_ctx.c (krb5_os_init_context), osconfig.c,
	realm_dom.c (krb5_get_realm_domain): Remove old ifdef'ed
	code which read in krb.conf and krb.realms.

read_pwd.c (krb5_read_password): Remove old #ifdef notdef code.
	Significantly simplified and cleaned up function.
	Removed BSD 4.3 compatibility code.  (If we ever need
	to make this work on a non-POSIX system, we'll supply
	POSIX termios emulation functions in src/lib/krb5/posix.)

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@5964 dc483132-0cff-0310-8789-dd5450dbe970