ksmbd-tools: release 3.4.6 version

The major changes are:

• Add meson build.
• Several clean-up and bug fixes.(leak, segfault, debug print, typo, etc)
• Improve usage strings and argument handling.
• Support --sysconfdir and --with-rundir(or -Drundir) options for configure
  or meson.(See the README for details.)
• Fix password prompting for ksmbd.adduser.
• Notify ksmbd of all commands of ksmbd.addshare and ksmbd.addshare.
• Inform ksmbd of stale share config.
• Fix passworkd prompting issues on ksmbd.adduser.
• Add manpages for all utils and ksmbd.conf.
• Rename smb.conf to ksmbd.conf.
• Set netlink socket's receive buffer size to 1 MiB(Recv() error Out of memory [-5])
• Add @group support to ksmbd.conf for lists of users.
• Casefold utf-8 share names.