This reverts commit cdfc94f4e9, reversing
changes made to 2051cd3e1c.
Conflicts:
initialize/config.go
system/etcd.go
system/etcd_test.go
system/fleet.go
system/fleet_test.go
system/update.go
system/update_test.go
test
When using openssh without pam it checks for a ! prefix in the password
field, locking the account entirely if found. The other common lock
character, *, is allowed by ssh to login via ssh keys so use it instead.
