Full path to target program.

If you provide this option, you have to pass the target program's own arguments after the double-hyphen phrase (`--`). In this case, *only* the program path is hashed into its ID. Its arguments are *not*. For example, you cannot run 2 commands below at once:

- {program_name} --target=/usr/bin/flatpak -- run a.b.c
- {program_name} --target=/usr/bin/flatpak -- run x.y.z

If you don't provide this option, you have to pass the target program's full path (and its arguments) after `--`. In this case, the program path and *all* of its arguments will be hashed. For examples, 2 commands below have one target program, but they are different, and you can run both of them at once:

- {program_name} -- /usr/bin/flatpak run a.b.c
- {program_name} -- /usr/bin/flatpak run x.y.z
