Backout recent initialization/startup changes in preparation for

new frontend-backend interface.

include/ldbm.h

@@ -202,7 +202,8 @@ LDAP_END_DECL
 
 LDAP_BEGIN_DECL
 
-int		ldbm_errno( LDBM ldbm );
+void ldbm_initialize( void );
+int	ldbm_errno( LDBM ldbm );
 LDBM	ldbm_open( char *name, int rw, int mode, int dbcachesize );
 void	ldbm_close( LDBM ldbm );
 void	ldbm_sync( LDBM ldbm );
@@ -212,16 +213,6 @@ Datum	ldbm_fetch( LDBM ldbm, Datum key );
 int	ldbm_store( LDBM ldbm, Datum key, Datum data, int flags );
 int	ldbm_delete( LDBM ldbm, Datum key );
 
-#ifdef LDBM_USE_DBBTREE
-#  if HAVE_BERKELEY_DB2
-	LDBM	ldbm_open_env( char *name, int rw, int mode,
-							int dbcachesize, DB_ENV *env );
-#  else
-	LDBM	ldbm_open_env( char *name, int rw, int mode,
-							int dbcachesize, void *env );
-#  endif
-#endif
-
 #if HAVE_BERKELEY_DB2
 	void   *ldbm_malloc( size_t size );
 	Datum	ldbm_firstkey( LDBM ldbm, DBC **dbch );