Support for Solus

[aguslr]

Substitutes issue #31.

More information:

• https://solus-project.com/
• irc://chat.freenode.net/#Solus-Dev
• https://www.reddit.com/r/SolusProject/
• https://twitter.com/SolusProject

Current issues:

• https://redd.it/5vzhi2
• Fix Solus probonopd/SystemImageKit#17

[probonopd]

In think we should ask Solus to provide a loopback.cfg.

[a1ive]

menuentry "solus 3.0 budgie from ISO" {
set isofile="Solus-3-Budgie.iso"
loopback loop (hd0,4)/$isofile
linux (loop)/boot/kernel root=live:CDLABEL=SolusLiveBudgie iso-scan/filename=/$isofile ro rd.luks=0 rd.md=0 quiet splash rd.live.image
initrd (loop)/boot/initrd.img
}

[aguslr]

@a1ive, well done! It works even with older ISOs. 😄

I'd swear I tried before that combination of boot parameters and it didn't work but I guess I missed something. I'll add support with PR #229.