grml-cheatcodes.txt: update fromiso doc.
authorMihai Moldovan <ionic@ionic.de>
Mon, 8 Mar 2021 20:20:54 +0000 (21:20 +0100)
committerMihai Moldovan <ionic@ionic.de>
Mon, 8 Mar 2021 20:20:56 +0000 (21:20 +0100)
This adds support for file system overrides and makes clear that the
device path prefix is actually optional.


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