Rasmus Villemoes <rv@rasmusvillemoes.dk> says: This started by me wanting something like what patch 8 does. That wasn't too hard, except we had no strcasestr(), and also our regex engine (which I didn't really want to pull into the mix anyway) doesn't have a flag that requests case-insensitive matching. So I wanted to add strcasestr(), but then I stumbled on a bunch of stuff that should be cleaned up in str-land. Link: https://lore.kernel.org/r/20260708203711.849489-1-rv@rasmusvillemoes.dk