add note about swift-init --kill-wait N

fixes bug 1095509

Adds a note about this new-to-grizzly parameter in swift-init
that is helpful in slow systems to ensure they don't kill
processes too early.

Change-Id: I76b159a6d8a54ad1085fb72cf4e7b6e34aa47440
remove reference to max_nbd_devices

fixes bug 1089191

max_nbd_devices is no longer a needed flag in grizzly

Change-Id: I42d3d68b4f4eb059dba04372b1f161b84e0f906c
remove allowed_sync_hosts option

fixes bug 1087058

This option was removed in grizzly as it provided little security.

Change-Id: I7548d55c63467b06e58a7a7ee1e6e8557b389f4a
Merge "remove reference to max_nbd_devices"
Merge "remove allowed_sync_hosts option"