fix a spello, and reword so misspell doesn't complain about it

doc.go

@@ -361,7 +361,7 @@ back to should an upgrade fail. Simply copying files in the data directory
 while mox is running can result in unusable database files.
 
 Message files never change (they are read-only, though can be removed) and are
-hardlinked so they don't consume additional space. If hardlinking fails, for
+hard-linked so they don't consume additional space. If hardlinking fails, for
 example when the backup destination directory is on a different file system, a
 regular copy is made. Using a destination directory like "data/tmp/backup"
 increases the odds hardlinking succeeds: the default systemd service file

http/gzcache.go

@@ -317,7 +317,7 @@ func (w *staticgzcacheReplacer) Header() http.Header {
 	return w.w.Header()
 }
 
-// WriteHeader checks whether the response is eligable for compressing. If not,
+// WriteHeader checks whether the response is eligible for compressing. If not,
 // WriteHeader on the underlying ResponseWriter is called. If so, headers for gzip
 // content are set and the gzip content is written, either from disk or compressed
 // and stored in the cache.

main.go

@@ -1024,7 +1024,7 @@ back to should an upgrade fail. Simply copying files in the data directory
 while mox is running can result in unusable database files.
 
 Message files never change (they are read-only, though can be removed) and are
-hardlinked so they don't consume additional space. If hardlinking fails, for
+hard-linked so they don't consume additional space. If hardlinking fails, for
 example when the backup destination directory is on a different file system, a
 regular copy is made. Using a destination directory like "data/tmp/backup"
 increases the odds hardlinking succeeds: the default systemd service file