Converted ch_malloc, ch_calloc and ch_realloc calls to SLAP_MALLOC and
SLAP_CALLOC in add_value/add_value_one functions and propagated errors to
all functions that use these functions.

add {create,modify}Timestamp to subschema subentry (SHOULD per RFC2251; use server startup time to be conservative)

inaccessible, this is original code, not contributed.)

Not sure how best to populate matchingRuleUses...

Fix nameAndOptionalIdentifer syntax.

Use typedefs for all backend functions, to minimize work in future API
updates. (back-*/external.h will never need updating in the future.)

from input.  This likely needs to be done by the frontend instead.
Add structuralObjectClass to the root and subschema dses.

SASL mech removed from backend bind callback (as SASL is managed by frontend)
Changes to some backends are untested (as I don't have all dependent
  software install)

to caller (do_search) such that info can be used by other
operations (ie: do_compare).
SLAPD_SCHEMA_NOT_COMPAT: Add additional code to support filters (needs work)

Don't use LDAP_OPERATIONS_ERROR for internal errors.  Use LDAP_OTHER
instead.  (more changes needed in this area)

basic structures for handing language tags and binary option
(but less actual code to actually support them).  Provided
for reference only.  Will not even compile.

rewrite.

Attribute subtyping, especially that using attribute description
options, will have to reengineered.

attributes of the syntax.  Such attribute values be transferred
using binary syntax unless ber2str/str2ber routines are provided.
Used in conjunction with ";binary" attribute description option
and/or the Binary syntax.

routines to separate file to keep schema.c of managable size.

MUST be defined).

behind -USLAPD_SCHEMA_COMPAT.

ldap_ucs2_t is a short.  The unicode routines may break if
sizeof(short) != 2...