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/server/email_notifications.rs

@@ -43,7 +43,7 @@ Deduplication Factor: {{deduplication-factor}}
 Garbage collection successful.
 
 
-Please visit the web interface for futher details:
+Please visit the web interface for further details:
 
 <https://{{fqdn}}:{{port}}/#DataStore-{{datastore}}>
 
@@ -57,7 +57,7 @@ Datastore: {{datastore}}
 Garbage collection failed: {{error}}
 
 
-Please visit the web interface for futher details:
+Please visit the web interface for further details:
 
 <https://{{fqdn}}:{{port}}/#pbsServerAdministration:tasks>
 
@@ -71,7 +71,7 @@ Datastore: {{job.store}}
 Verification successful.
 
 
-Please visit the web interface for futher details:
+Please visit the web interface for further details:
 
 <https://{{fqdn}}:{{port}}/#DataStore-{{job.store}}>
 
@@ -89,7 +89,7 @@ Verification failed on these snapshots/groups:
 {{/each}}
 
 
-Please visit the web interface for futher details:
+Please visit the web interface for further details:
 
 <https://{{fqdn}}:{{port}}/#pbsServerAdministration:tasks>
 
@@ -105,7 +105,7 @@ Remote Store: {{job.remote-store}}
 Synchronization successful.
 
 
-Please visit the web interface for futher details:
+Please visit the web interface for further details:
 
 <https://{{fqdn}}:{{port}}/#DataStore-{{job.store}}>
 
@@ -121,7 +121,7 @@ Remote Store: {{job.remote-store}}
 Synchronization failed: {{error}}
 
 
-Please visit the web interface for futher details:
+Please visit the web interface for further details:
 
 <https://{{fqdn}}:{{port}}/#pbsServerAdministration:tasks>
 
@@ -152,7 +152,7 @@ Tape Drive: {{job.drive}}
 Tape Backup successful.
 
 
-Please visit the web interface for futher details:
+Please visit the web interface for further details:
 
 <https://{{fqdn}}:{{port}}/#DataStore-{{job.store}}>
 
@@ -171,7 +171,7 @@ Tape Drive: {{job.drive}}
 Tape Backup failed: {{error}}
 
 
-Please visit the web interface for futher details:
+Please visit the web interface for further details:
 
 <https://{{fqdn}}:{{port}}/#pbsServerAdministration:tasks>
 

src/server/worker_task.rs

@@ -749,7 +749,7 @@ impl WorkerTask {
             match data.abort_listeners.pop() {
                 None => { break; },
                 Some(ch) => {
-                    let _ = ch.send(()); // ignore erros here
+                    let _ = ch.send(()); // ignore errors here
                 },
             }
         }