Some test sources files, objects, or programs were missing from SRCS,
OBJS, all, check-pytests, or clean.  t_oid was also out of order in a
couple of places.

Add a new test program t_iov.c which tests various combinations of
wrapping and unwrapping using the IOV and AEAD interfaces.  Run it
with and without SPNEGO in each enctype configuration.

Mostly this gets rid of the trailing space on line 2 after
bb76891f5386526bdf91bc790c614fc9296cb5fa.

These tests mainly exercise the client-side GSSAPI code for S4U2Self
and S4U2Proxy.  They also exercise the KDC code for S4U2Self, but only
the denial logic for S4U2Proxy since the DB2 back end doesn't support
constrained delegation currently.

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25531 dc483132-0cff-0310-8789-dd5450dbe970

For default credentials, defer ccache resolution until we need the
information.  If this happens in init_sec_context when we have the
target principal in hand, use krb5_cc_select() to pick a cache.  If
the target principal is not known, use the default cache.

For credentials with a specified principal, use krb5_cc_cache_match()
to find the cache.  If no cache is found and a password is specified,
create a new cache within the collection to hold the new credentials,
if the default cache type supports a collection.

ticket: 6958

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25160 dc483132-0cff-0310-8789-dd5450dbe970

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@25108 dc483132-0cff-0310-8789-dd5450dbe970

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@24662 dc483132-0cff-0310-8789-dd5450dbe970

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@24561 dc483132-0cff-0310-8789-dd5450dbe970