Needs a bit more work.
	- global net/api timeouts are not inherited on session creation.
	- need configure check for inet_aton() (coming soon)
	- ioctl/fcntl portability issues (should share implementation
		with lber routines)

s/exit(0)/exit(EXIT_SUCCESS)/
add <ac/stdlib.h> where needed and other minor header adjustments

- Filter no longer a required controlArray member, defaults to objectclass=*.
- Sets errorCode with LDAP macro string value (better to test than the more
  human readable values).
- Shorten minimum required characters for search scope definitions: now allows
  "base", "one", and "sub".  For the latter two, additional characters are
  ignored.
- Now compiles successfully with -devel branch (though less tested).
- Client cache management code enabled for OpenLDAP versions <= 1.2.4.  (This
  code is relatively untested and feedback is welcome.)
- More installation cleanups to work easily as a dynamically loadable Tcl
  package.

This code is not called (yet).

Replace `lber_int_debug = ...' with `ber_set_option( ... )'

Add missing arg (refs or ctrls) to send_ldap_result() calls.
NOTE: Did not implement referral/ldapcontrol support in back-tcl.

Improve detection of FreeBSD FetchURL library.

a UDP listener.

Remove sizeof(long).
Change ber_getnint to return ber_len_t instead of ber_tag_t.