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/tape/file_formats/snapshot_archive.rs

@@ -21,7 +21,7 @@ use crate::tape::{
 ///
 /// This ignores file attributes like ACLs and xattrs.
 ///
-/// Returns `Ok(Some(content_uuid))` on succees, and `Ok(None)` if
+/// Returns `Ok(Some(content_uuid))` on success, and `Ok(None)` if
 /// `LEOM` was detected before all data was written. The stream is
 /// marked inclomplete in that case and does not contain all data (The
 /// backup task must rewrite the whole file on the next media).