- Copy stable/10 (r259064) to releng/10.0 as part of the
10.0-RELEASE cycle.
- Update __FreeBSD_version [1]
- Set branch name to -RC1

[1] 10.0-CURRENT __FreeBSD_version value ended at '55', so
start releng/10.0 at '100' so the branch is started with
a value ending in zero.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Remove the last reference to LOGIN_ACCESS from login(1).

MFC after: 3 days

Like su(1), make PAM use mandatory. Remove parts of the authentication
logic that are handled by PAM. Fix documentation to reflect this.

Remove option's description that has gone with PAM.

Modify klogin to:

1) Don't spit out an error message if Kerberos is installed but not yet
set up.

2) Don't attempt to verify the ticket you got back, as workstations
are not intended to have srvtab files of their own.

Both behaviors can be re-enabled with KLOGIN_PARANOID.

Add skey supprot
Reviewed by:
Submitted by: guido