typo fixes all over the place

found and semi-manually replaced by using:
 codespell -L mut -L crate -i 3 -w

Mostly in comments, but also email notification and two occurrences
of misspelled  'reserved' struct member, which where not used and
cargo build did not complain about the change, soo ...

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

src/tools/lru_cache.rs

@@ -302,7 +302,7 @@ impl<K, V> LinkedList<K, V> {
         }
     }
 
-    /// Remove the node referenced by `node_ptr` from the linke list and return it.
+    /// Remove the node referenced by `node_ptr` from the linked list and return it.
     fn remove(&mut self, node_ptr: *mut CacheNode<K, V>) -> Box<CacheNode<K, V>> {
         let node = unsafe { Box::from_raw(node_ptr) };