High: nfsserver: Keep statd directories synced with ha backup
High: nfsserver: introducing nfs_no_notify option for suppressing reboot notifications

There is a use-case for nfsserver that requires NFSv3 reboot
notifications to be posponed until after both the nfs server
and floating IP have been started. The nfs_no_notify option
allows us to suppress the reboot notifications until after
the floating ip has started.