r7908: * change REGISTRY_HOOK api to use const (fix compiler warning

r7908: * change REGISTRY_HOOK api to use const (fix compiler warning
  in init_registry_data()
* Add means of storing registry values in registry.tdb
* add builtin_registry_values[] array for REG_DWORD and REG_SZ
  values needed during startup
* Finish up RegDeleteValue() and RegSetValue()
* Finish up regdb_store_reg_values() and regdb_fetch_reg_values()

I can now create and retrieve values using regedit.exe on Win2k.

bin/net -S rain -U% rpc registry enumerate 'hklm\software\samba'
Valuename  = Version
Type       = REG_SZ
Data       = 3.0.20

Next is to do the virtual writes in reg_printing.c and I'll be
done with Print Migrator (yeah!  finally)
(This used to be commit 3d837e58db9ded64d6b85f047012c7d487be4627)