MFC r257531:

Do not exit with error status after printing data for perftest.

Sponsored by:	Intel
Approved by:	re (glebius)
MFC r257534:

Create a unique unit number for each controller and namespace cdev.

Sponsored by:	Intel
Approved by:	re (glebius)
MFC r257539:

When zero'ing out a buffer, make sure we are using right size.

Without this change, in the worst but unlikely case scenario, certain
administrative operations, including change of configuration, set or
delete key from a GEOM ELI provider, may leave potentially sensitive
information in buffer allocated from kernel memory.

We believe that it is not possible to actively exploit these issues, nor
does it impact the security of normal usage of GEOM ELI providers when
these operations are not performed after system boot.

Security:	possible sensitive information disclosure
Submitted by:	Clement Lecigne <clecigne google com>
Approved by:	re (glebius)
Regenerate src.conf(5) after r257573

Direct commit to stable/10 with no mergeinfo as the head
change to regenerate src.conf(5) for this was missed after
r257440 until r257444 which brought in unrelated changes.

Discussed with:		gjb
Approved by:		re (gjb, implicit)