A rather big change set ! (listed in no particular order)

A rather big change set ! (listed in no particular order)

- changed the default forms flag to 2
- all short architecture name are uppercased
- get_short_archi() is now case unsensitive
- the drivers TDB is indexed by archi/version/name
- implemented code to move drivers from the upload area to the download
area. Someone else need to look at that code.
- don't return anymore a default driver if it doesn't exist in the TDB.
Instead return an error.
- cleaned prs_unistr.
- #ifdef out jeremy's new SD parsing in printer_info_2
- removed the unused MANGLE_CODE

- #ifdef out the security checking in update_printer() as it doesn't work
for me.

Zap your ntdrivers.tdb, it won't work anymore.

	J.F.
(This used to be commit ac0a145acc0953a6f362497abbf4dfe70aa522a6)