update misc notices

Also, pass empty_bv when bv_val is NULL.

subdirectories; add explicit dependencies for subdirs that need them.

Add saucer/Makefile.in, add saucer to configure and top-level Makefile,
include "portable.h" and <ac/*.h>,
replace ldap_debug/lber_debug with ldap_set_option/lber_set_option.

Building tests/progs/*.c in the main build process.
==> Test-suite must be called by 'make test', or 'make test-bdb2'

autoconf/automake environment and should always use provided configure.

  Updated to use libtool 1.2 (with FreeBSD3.0 a.out v. elf detection).
  Updated autoconf to 1.12 with sed patch (don't use stock 1.12).
  aclocal.m4 is built using automake's aclocal, v1.3.
  Updated mkdep to support libtool .lo files.
Updated automake provided macros for TERMIOS, STRTOD, MKTIME, PTRDIFF_T
Autoconf now checks to ensure C compiler supports ANSI C prototypes.
Updated make files templates.

Add basics of Kerberos detection.