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
Added place holder for LDAP_FILTER_EXTENDED code.
Added assert() here and there and removed lint.
Removed version promotion code (version must be manually set).
Added messages.c to MSVC project.
