def_realm.c (krb5_get_default_realm): Use the profile code to

def_realm.c (krb5_get_default_realm): Use the profile code to
	get the default realm from [libdefaults]/default_realm.

get_krbhst.c (krb5_get_krbhst): Use the profile code to get the
	list of Kerberos servers for a particualar realm from
	[realms]/<realm>/kdc

realm_dom.c (krb5_get_realm_domain):  Use the profile code to
	get the default domain postfix for a realm (used only to
	convert V4 -> V5 principals) from
	[realms]/<realm>/default_domain

hst_realm.c (krb5_get_host_realm): Use the profile code to get
	the default realm given a particular host from
	[domain_realm]/<host|domain>

init_os_ctx.c (krb5_os_init_context): When the OS context is
	initialized, also initialize the profile file.  This loads
	in the /etc/krb5.conf file.

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@5438 dc483132-0cff-0310-8789-dd5450dbe970