Allowing password-protected generation data sets to be migrated, then scratched without checking the password at roll-off time

When the MCVTFPW bit is set to 1, DFSMShsm allows password-protected generation data sets to be migrated. Then, when generations are rolled off, the generation data sets are scratched without the password being checked. To set this bit to 1, enter the following command:

PATCH .MCVT.+53 BITS(.1......) /* allow pswd protected GDS to migrate then  */
                               /* scratch without checking pswd at roll-off */

This allows DFSMShsm to migrate password-protected generation data sets, and also allows DFSMShsm to ignore the password requirement when it scratches the oldest generation of a password-protected generation data set that has been migrated at the time of roll off.