Add -n option to slapd

- filter -> SQL translation bugfixes
- several memory leaks fixups
- improved configurability:
    - allows definition of  uppercasing function to support CIS matching on databases that do
    case sensitive compares (this fixes up Oracle issues, example updated)
    - allows more flexibility in stored procedures interface (different parameter order, optional return
      codes - see samples, and comments in backsql.h)
- synchronize function interfaces to recent changes in prototypes ("const" clauses etc.) made for all backends
  (those changes led to compile-time errors)

implemented in SLAPD_SCHEMA_NOT_COMPAT

HAVE_BERKELEY_DB3.  Configuration support
hopefully coming soon.

Add syntax normalizer, separate from matching rule normalizer.
with mr normalizer defaulting to syntax normalizer.  This allows
for more consistent handling of some syntaxes, such as directoryString
(where all matches should ignore leading, trailing, and other extra
spaces).

and prettier (to be used by update operations).

	(2.5.4.0=2.5.6.0) works!	ie: (objectclass=top)