Add substitution of WRAP_LIBS

  libwrap was a dynamic library). Added -lwrap to new subst var WRAP_LIBS
  so we have more control over where it get's linked (dynamic libwrap
  causes problems when we link to programs that don't define certains
  globals that libwrap expects).
* build/top.mk: Added placeholder for WRAP_LIBS subst
* servers/slapd/Makefile.in: Added $(WRAP_LIBS) to the slapd and sslapd
  link command line specifically so it doesn't get thrown in with the rest
  of the LIBS.
* configure: rebuilt

to go through and find/fix buffer overflows and such.

If not available, LDBM uses big mutex and BDB2 is disabled.
Should add BerkeleyDB version detection...

Insert reference to ITS webpage

and back-ldbm are preserved, they only use the up-cased DNs. back-passwd
uses the mixed-case DN. All others are using mixed-case DN, may need more
fixing.

Let oc_check_allowed grok things like userCertificate;binary
oc_check_required should be fixed too.

Let at_find find the AttributeType that matches a given AttributeDescription.
Useful to deal with things like userCertificate;binary.

Add missing paren.

build/openldap.m4 and configure.in