- SyncRepl support in back-ldbm
- back-ldbm functions return LDAP return codes for internal operations (callback)
- subentry code copy from back-bdb
- Misc udpates

Coverted LDAP_LOG macro to use subsystem ID int values instead of string values

by the giant rwlock.

Now operations that set the status of an entry to CREATING (add.c, modrdn.c)
need to set it to COMMIT, by calling cache_entry_commit, before returning
the entry itself, otherwise the entry is removed from the cache
and its private data is freed.
Should fix crashes due to add failures as in ITS#1245

Reworked API of nextid; e_private gets destroyed separately from the entry in case add fails (should fix ITS#1245)

added function cache_find_entry_ndn2id that avoids an unnecessary call to dn_normalize; now dn2id calls this function, while the original function has been left as a wrapper

Plus more pthread rwlock code

s/dn_normalize/dn_validate/
s/dn_normalize_case/dn_normalize/

Replace old Id as needed (back-tcl).
Leave updating of contribWare to contributors (for now).

NULL does not meet basic syntax rules.

  added slap_ and ldbm_ to many structures
  added typedefs to many structures
  used typedefs
New main.c argument parsing with ldap url support (replacing -a address).
New sockaddr_in handling and support for multiple listeners.

Move Debug messages outside of c_mutex.  Other LDBM cache codes
also should be streamlined.  Resultant approaches should then
be applied to back-bdb2.