### Release 8.9.0 ¶

- `nncp-toss` command has `-gen-ack` option. `nncp-daemon`, `nncp-caller`, `nncp-call` commands have `-autotoss-gen-ack` option. They automatically generate ACK packets and store corresponding `spool/tx/ack/` references to them, to be able to remove them after the transfer.
- `autotoss-gen-ack` appeared in call configuration. `ack` section appeared in neighbour configuration.
- `nncp-rm` command has `-ack` option to remove packets referenced by stored `spool/tx/ack/` files generated during tossing.
- Get rid of `redo` build system during installation, as there are virtually none dependencies, just only compilation of the Go code.
- Updated some dependencies.