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.