softhsm: 2.3.0 -> 2.4.0

Semi-automatic update. These checks were done:

- built on NixOS
- ran `/nix/store/cs5ycqjsa2lklgx5slaja3gshxf2g7r5-softhsm-2.4.0/bin/softhsm2-keyconv -h` got 0 exit code
- ran `/nix/store/cs5ycqjsa2lklgx5slaja3gshxf2g7r5-softhsm-2.4.0/bin/softhsm2-keyconv --help` got 0 exit code
- ran `/nix/store/cs5ycqjsa2lklgx5slaja3gshxf2g7r5-softhsm-2.4.0/bin/softhsm2-keyconv -V` and found version 2.4.0
- ran `/nix/store/cs5ycqjsa2lklgx5slaja3gshxf2g7r5-softhsm-2.4.0/bin/softhsm2-keyconv -v` and found version 2.4.0
- ran `/nix/store/cs5ycqjsa2lklgx5slaja3gshxf2g7r5-softhsm-2.4.0/bin/softhsm2-keyconv --version` and found version 2.4.0
- ran `/nix/store/cs5ycqjsa2lklgx5slaja3gshxf2g7r5-softhsm-2.4.0/bin/softhsm2-util -h` got 0 exit code
- ran `/nix/store/cs5ycqjsa2lklgx5slaja3gshxf2g7r5-softhsm-2.4.0/bin/softhsm2-util --help` got 0 exit code
- ran `/nix/store/cs5ycqjsa2lklgx5slaja3gshxf2g7r5-softhsm-2.4.0/bin/softhsm2-util -V` and found version 2.4.0
- ran `/nix/store/cs5ycqjsa2lklgx5slaja3gshxf2g7r5-softhsm-2.4.0/bin/softhsm2-util -v` and found version 2.4.0
- ran `/nix/store/cs5ycqjsa2lklgx5slaja3gshxf2g7r5-softhsm-2.4.0/bin/softhsm2-util --version` and found version 2.4.0
- found 2.4.0 with grep in /nix/store/cs5ycqjsa2lklgx5slaja3gshxf2g7r5-softhsm-2.4.0
- found 2.4.0 in filename of file in /nix/store/cs5ycqjsa2lklgx5slaja3gshxf2g7r5-softhsm-2.4.0