clean up error code macros

so this feature is unnecessary. Also it was breaking Unix dynamic builds.

	need liblutil for lutil_getopt
	must quote args with embedded whitespace
	must track child processes in order to wait()

(must regenerate configure)

Patch: str2entry() dereferences NULL  (ITS#1822)

Sorry, last patch was wrong.  I didn't notice that e->e_dn
always is NULL at that point.  Here is a corrected patch.

  must include <ac/stdlib.h> to get MAX_PATH defined.
  use LDAP_DIRSEP instead of '/' in paths
  define truncate/ftruncate macros, etc.

Subject: Patch: str2entry() dereferences NULL  (ITS#1822)

entry.c:str2entry() prints pdn->bv_val even though pdn is always
NULL.  pdn was pretty dn before version 1.80.

			================
Written by Hallvard B. Furuseth and placed into the public domain.
This software is not subject to any license of the University of Oslo.
			================

A surrogate parent is supposed to keep back-shell children from
deadlocking due to resources locked by a threading parent.

Implementation note: The surrogate parent closes all unused file
descriptors, so it logs errors to stderr instead of via Debug() and
uses relloc() instead of ch_realloc().

Also close a file descriptor leak if fork() fails in fork.c.

Hallvard B. Furuseth <h.b.furuseth@usit.uio.no>, May 2002.

			================
Written by Hallvard B. Furuseth and placed into the public domain.
This software is not subject to any license of the University of Oslo.
			================

searchexample.conf needs core.schema, otherwise it fails on the suffix
DN.  searchexample.sh has a spurious 'sleep', probably from testing.
Also, I suggest 'chmod +x searchexample.sh'.

Hallvard B. Furuseth <h.b.furuseth@usit.uio.no>, May 2002.

(Cyrus SASL 2 library may not be called -lsasl2).

Truncate large username instead of failing with SASL_BUFOVER; we only care
about the DN anyway. (SASL 2 only)

set once; setting erases all existing values.