extensions field in the contained structures.

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)

Parsing and printing of extensions in schema definitions.

#define PTH_SYSCALL_SOFT 1

to appropriate syntaxes.

	added new value_normalize() code
	need LDAPsyntaxes X- field support

memalloc/memcpy instead of strdup

SLAPD internals
	rootdse,cn=schema compare
	rootdse user configurable attributes (cn,description,seeAlso,etc)

Update comments in cosine.schema

	Calls value_normalize per substr component (like old code),
	likely should have/call substr_normalize which takes all components
		at once (to allow more sophisticated normalization)