modules/db_mysql, modules_k/db_oracle, modules_k/db_sqlite, modules_k/db_unixodbc: Updated to work with latest lib/srdb1
- db_do_init() in lib/srdb1 has an extra parameter to allow a unique
(non-pooled) connection to be created.
- These DB modules do not yet support non-pooled connections so the
init functions in the modules just call db_do_init() with the new
parameter set to 0.