Replace util_ordering.c with a new file util_seqstate.c, implemented
using a bitmap of previously received sequence numbers instead of a
20-element circular queue.  This approach has slightly different
limitations--it can check for replays for values within 64 of the
expected next number, where the old code could check within the range
of the last 20 received numbers regardless of how far apart they are.
The new approach should work as well or better for any realistic
packet reordering scenario.

ticket: 7879 (new)

Use an opaque structure type instead of a void pointer for the
sequence number state.  Rename all functions to use a g_seqstate
prefix rather than a mix of g_order and g_queue.  Remove the
unneccessary indirection from the state object parameter in
g_seqstate_check and g_seqstate_free.  Return OM_uint32 where we
return a GSS major code, long where we return an errno value, and void
where we can't fail.

Since we no longer prefix an "#include <stdint.h>" in the gssapi.h
preamble at build time, include it in gssapi.hin.

Update util/gss/kernel-lib/Makefile.in to account for gssapi_krb5.h
being in the source tree.

Provide default values in pre.in for PROG_LIBPATH, PROG_RPATH,
SHLIB_DIRS, SHLIB_RDIRS, and STOBJLISTS so that they don't have to be
specified in the common case.  Rename KRB5_RUN_ENV and KRB5_RUN_VARS
to RUN_SETUP (already the most commonly used name) and RUN_VARS.  Make
sure to use DEFINES for local defines (not DEFS).  Remove some other
unnecessary makefile content.

Rename the krb5int_buf_ family of functions to use the k5_ prefix for
brevity.  Reformat some k5buf implementation code to match current
practices.

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

The initial k5test.py design, copied from the dejagnu suite, is to
create config files and environments for four expected roles: client,
server, master, and slave.  This approach exaggerates the complexity
of the common case, where the configurations don't need to vary, and
limits us to having just one slave for kprop/iprop tests.

Instead, create just one configuration by default, and add a
special_env() method which sets up a differently configured
environment for the few test cases which need one.  The run_as_*()
methods are collapsed into just run(), which accepts an optional
argument for the environment returned by special_env().

Since there is no overlap between the clpreauth and kdcpreauth
interface declarations, there's no particular reason to combine them
into one header.  For backward compatibility and convenience, leave
behind a preauth_plugin.h which includes both.

Use free() instead of gss_release_buffer() when freeing the locally
allocated context_token in the sample gss-server program.  Use
gssalloc_free() instead of free when freeing buffers in
t_kgss_kernel.c (where we can't use gss_release_buffer).