Sync portable.h.nt with portable.h.in

Add ac/bytes.h to provided sized types.
Use new sized type in md5/sha1 header through simple typedef.
Should substitute old type for new everywhere.

not to require knowledge of byte order such that this check can be removed.

Update NT port.

If it is not, then everything must use threading libraries.

upon library and function, but not secondary libraries.  Must use
different functions in such cases.

	configure checks for getpwuid(), sys/resource.h, and pwd.h
	Fix !TERMIOS && !SGTTY ifdef in ud/util.c

-thread & -pthread are still treated as libraries, will need
additional work to use them as CFLAGS.
Eliminated HAVE_DCE define (was redundant) and its use.  Code
now relies on draft4 and function existance tests.

Fix old -pthread -lmach ... support to check for -lc_r instead of -lc.

Fix pthread_attr_init/destroy pthread draft4 compatibility.

  configure generates ldap_features.h based from ldap_features.h.in
  LDAP_REFERRALS -> LDAP_API_FEATURE_OPENLDAP_V2_REFERRALS
  LDAP_DNS -> LDAP_API_FEATURE_OPENLDAP_V2_DNS

Updated portable.h.nt based upon portable.h.in (1.11).

Remove AC_GCC_TRADITIONAL check.  Likely to cause more harm than good.

modify apps to use TOLOWER/TOUPPER macros to ensure isupper/islower is
called when approprate.

Now require --enable-x-compile if cross compiling.
Add tests for threadsafe/reentrant functions.
Add tests for setconcurrency functions.

work better.

Remove lint

Updated portable.h.nt.
Still having problems with tests.

Need to sort out remaining ifnames and run testsuite.

LTHREAD still needs work.