Also make various improvements and fixes:
- Rename pname from lsiutils to lsiutil since that is the actual name
- Update the URL since the old one was broken
- Inline the call to fetchurl
- Use the installPhase to install instead of installing in the buildPhase
- Replace a call to the modprobe binary with the absolute path to the binary
- Properly determine the absolute path of the mknod binary
- Update the description with text from the source code header
- Declare that this only works on Linux
- Add myself as maintainer
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