Modified NT changes to work under UNIX.

configure

configure.in

include/ac/regex.h

include/ac/socket.h

include/ldap.h

include/portable.h.in

libraries/liblber/etest.c

libraries/liblber/io.c

libraries/libldap/abandon.c

libraries/libldap/add.c

libraries/libldap/addentry.c

libraries/libldap/bind.c

libraries/libldap/charset.c

libraries/libldap/cldap.c

libraries/libldap/compare.c

libraries/libldap/delete.c

libraries/libldap/error.c

libraries/libldap/friendly.c

libraries/libldap/getattr.c

libraries/libldap/getdn.c