smbd: update to 3.1.1, rename to "ksmbd", "ksmbd-tools"

smbd: update to 3.1.1, rename to "ksmbd", "ksmbd-tools"

* rename smbd->ksmbd (upstream name change)
* ksmbd-tools: build with static glib2 (usmbd = ~90kb, smbuseradd = ~40kb)
* new etc folder location = /etc/ksmbd/smb.conf
* new database name = /etc/ksmbd/ksmbdpwd.db
* fixes "map to guest = Bad User" while userdb is also used
* fixes missing ipv6 support
* update/rename to "luci-app-ksmbd"
* remove UCI samba compatibility code for section names (ksmbd uses [share] + [globals] not [sambashare] + [global])

* ksmbd: release 3.1.1 version
* ksmbd: does not work if ipv6 module is not loaded or compiled in
* ksmbd: capsule ifdef CONFIG_SMB_INSECURE_SERVER with smb1 codes
* ksmbd: release 3.1.0 version
* ksmbd: fix over 80 character warnings
* ksmbd: rename smbd-tools to ksmbd-tools in travis.yml
* ksmbd: fix password db file location in travis.yml
* ksmbd: rename smbd prefix function to ksmbd
* ksmbd: rename smbd prefix source files to ksmbd
* Revert "smbd: set connection status with SMBD_SESS_EXITING instead of direct destory"
* ksmbd: rename smbd to ksmbd in .travis.yml
* smbd: rename module name to ksmbd.ko
* smbd: set connection status with SMBD_SESS_EXITING instead of direct destory
* smbd: previous session with same user and same password should be deleted
* smbd: only use global session table in smb2 session
* smbd: add support for ipv6
* smbd: fix empty macro issue from smbd_debug
* cifsd: fix printing of file names in find_next

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