verify uid/gid are positive, not non-negative.

used to fetch the pw_passwd which is than passwd to crypt().
getspnam() is used instead of getpwnam() when available.
Added configration detection of pw_passwd, shadow.h, getpwnam()
and getspnam().

ith --enable-modules. GLib v1.2 or higher is required.

Added connection initialisation and destruction notification. Now backends can register functions in backend_info.bi_connection_init and backend_info.bi_connection_destroy that will be called when a connection is initialized or destroyed.

use.

answers from Innosoft servers, but expect better tokenization in the
future.

s/setup.exe/setup.txt/g
create workspace for testing purposes.

added lber_types.h.nt, lber_types.h.in
removal of NULLxxx internal macros (in favor of NULL).
ch_free added to slapd,slurpd/ch_malloc.c
#define free ch_free (should be removed after s/free/ch_free/g) in proto-slap.h
ch_malloc and friends use ber_memalloc and friends

compiling errors on other platforms.  Will need to update NT projects.