[development] Schema API committed for D6

[Barry Jaspan]

Dries committed the Schema API patch this morning.  Henceforth, all
tables should be declared in .schema files and update functions should
use the Schema API instead of explicit SQL or the former pgsql-only
db_add_column()/db_change_column() functions in update.php.  (Explicit
SQL and those pgsql-functions will keep working, of course, so this
does not represent a "flag day" for contrib.)

The schema.module in contrib will automatically generate a schema data
structure for any table that already exists in the database; you can
then copy and paste it into your .schema file.

I'll be writing some handbook pages for all of this in the near future.

Thanks,

Barry