Fixed parsing of noidlen

Install ldap_schema.h

library use:
  LBER_ macros expand to system routines.
  LDAP_ macros expand to new ber_ allocators.

Add ber_ and ldap_ memory allocators/deallocator:
  ber_ routines are wrappers of LBER_ macros.
  ldap_ routines are wrappers of ber_ routines.

Removed safe_realloc() macro from various files.  This issue
(if an issue) should be resolved across whole package.

ldapmodify.c now uses ber_ allocators to resolve ber_bvfree()
vs. WIN32 multiple heaps issue.

These changes should facilate implementation of
  ber_set_option( NULL, LBER_OPT_MEMORY_FN, ...)
and
  ldap_set_option( NULL, LDAP_OPT_MEMORY_FN, ...).

Added validation to exposed opaque data structures (BerElement, Sockbuf,
and LDAP).  Added macros BER_VALID, SOCKBUF_VALID, LDAP_VALID.
Added ber_pvt_ber_bytes() and ber_pvt_ber_remaining() macros to hide
some ber internals.  These really should be handled by ber_get_option().

Provide (and use) #define shortcuts
Really kill global_oc & global_at
Publish schema through LDAP (really, it's there at last :-)

safe_string_free was freeing the string value, so we have to save it.

First step in new schema support.

Add schema support

Change to be in line with libldap, i.e. add schema

values will obscure EOF condition on closed sockets.

This will facilate version.c generation on non-UNIX systems.

prototype in ldap-int.h.

Incorporate #define's per Kurt's suggestion

to avoid accessing c_conn_state after close.

AM_INIT_AUTOMAKE.

locking requires and possibly restructure locking.

part fails if it does.