smbd: rename from cifsd, update to 3.0.1

smbd: rename from cifsd, update to 3.0.1

* follow upstream rename to 'smbd' and 'smbd-tools'
* config is '/config/smbd' and '/etc/smbd/smb.conf'
* smbd: update to 3.0.1
* smbd: fixes delete access on readonly shares
* smbd: add patch to keep version metadata in kmod
* smbd: add synchrous kill_server patches
* smbd-tools: update to 3.0.1
* smbd-tools: userspace service is now 'usmbd'
* smbd-tools: userspace tools are: 'smbuseradd', 'smbshareadd' with /etc/smbd/smbdpwd.db
* smbd-tools: split package into server/utils (reduce size)
* smbd-tools: fix init (luci save&apply)
* smbd-tools: remove kill_server related timeouts

Signed-off-by: Andy Walsh <andy.walsh44+github@gmail.com>