comments: the options window says what each part is and why

1,874 comment lines become 430; the code is unchanged. The note about
reference graphics CVars that pfUI writes and benilla leaves
unregistered described the CVar registry, not this file. It moves there
with its addresses.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

crates/benilla-app/src/cvars.rs

@@ -210,6 +210,13 @@ pub(crate) fn registered_pairs() -> impl Iterator<Item = (&'static str, &'static
 /// The host-backed CVars. Grows one row per knob a settings page actually wires — never ahead of
 /// the knob (see the module doc) — and every row states where its default stands against the
 /// reference's ([`Registered`]).
+///
+/// Unregistered for want of a reader, though pfUI's `hdgraphic` writes them through `ConsoleExec`:
+/// `lodDist` (`0x688524`, "100.0", read at `0x6afb1d` for the doodad LOD swap), `footstepBias`
+/// (`0x6888b4`, "0.125", read at `0x68fcb6`), `mapObjLightLOD` (`0x6886ec`, "0") and `SkyCloudLOD`
+/// (`0x6d1d33`, "0"). `DistCull` (`0x688570`) and `texLodBias` (`0x6885e2`, whose sink `0x672640`
+/// is `ret 4`) have no reader in the reference either. `maxLOD` is no CVar: none of the 214
+/// `CVar::Register` (`0x63db90`) sites names it.
 pub(crate) const REGISTERED: &[Registered] = &[
     // The realm the session is on — a REAL 1.12 CVar (`0x83f2d0`, persisted, wow-re
     // `savedvariables-protocol.md`: the client builds its SavedVariables path from it), and a live