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/drive/mod.rs

@@ -209,7 +209,7 @@ pub trait TapeDriver {
     /// Set or clear encryption key
     ///
     /// We use the media_set_uuid to XOR the secret key with the
-    /// uuid (first 16 bytes), so that each media set uses an uique
+    /// uuid (first 16 bytes), so that each media set uses an unique
     /// key for encryption.
     fn set_encryption(
         &mut self,
@@ -465,7 +465,7 @@ pub fn request_and_load_media(
     }
 }
 
-/// Aquires an exclusive lock for the tape device
+/// Acquires an exclusive lock for the tape device
 ///
 /// Basically calls lock_device_path() using the configured drive path.
 pub fn lock_tape_device(
@@ -539,7 +539,7 @@ fn tape_device_path(
 
 pub struct DeviceLockGuard(std::fs::File);
 
-// Aquires an exclusive lock on `device_path`
+// Acquires an exclusive lock on `device_path`
 //
 // Uses systemd escape_unit to compute a file name from `device_path`, the try
 // to lock `/var/lock/<name>`.