manual push bytes about.  Allows ber_*_t to be any 32-bit or
larger type.  Reworked AC_{HTON,NTOH}{L,S} macros to care only
about 32-bit (netlong) and 16-bit (netshort) reordering as
needed for BSD socket interface.

Select appropriopriate hton{s,l} function to use in lber-int.h.

in extended.c if SLAPD_EXTERNAL_EXTENSIONS is defined. Add #ifdef here.

Implementation coming soon.