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/config/network/helper.rs

@@ -82,7 +82,7 @@ pub fn check_netmask(mask: u8, is_v6: bool) -> Result<(), Error> {
     Ok(())
 }
 
-// parse ip address with otional cidr mask
+// parse ip address with optional cidr mask
 pub fn parse_address_or_cidr(cidr: &str) -> Result<(String, Option<u8>, bool), Error> {
 
     lazy_static! {

src/config/tape_encryption_keys.rs

@@ -4,10 +4,10 @@
 //! indexed by key fingerprint.
 //!
 //! We store the plain key (unencrypted), as well as a encrypted
-//! version protected by passowrd (see struct `KeyConfig`)
+//! version protected by password (see struct `KeyConfig`)
 //!
 //! Tape backups store the password protected version on tape, so that
-//! it is possible to retore the key from tape if you know the
+//! it is possible to restore the key from tape if you know the
 //! password.
 
 use std::collections::HashMap;

src/config/tfa.rs

@@ -590,7 +590,7 @@ impl TfaUserChallengeData {
     }
 
     /// Save the current data. Note that we do not replace the file here since we lock the file
-    /// itself, as it is in `/run`, and the typicall error case for this particular situation
+    /// itself, as it is in `/run`, and the typical error case for this particular situation
     /// (machine loses power) simply prevents some login, but that'll probably fail anyway for
     /// other reasons then...
     ///