Hashtable.h fix comments

Author: WilhelmWiens

src/hashtable.h

@@ -70,12 +70,11 @@ void hashtable_close(hashtable_t *hashtable);
  *
  * @hashtable: The hashtable object
  * @key: The key
- * @key: The length of key
- * @serial: For addition order of keys
+ * @key_len: The length of key
  * @value: The value
  *
  * If a value with the given key already exists, its value is replaced
- * with the new value. Value is "stealed" in the sense that hashtable
+ * with the new value. Value is "stolen" in the sense that hashtable
  * doesn't increment its refcount but decreases the refcount when the
  * value is no longer needed.
  *
@@ -88,7 +87,7 @@ int hashtable_set(hashtable_t *hashtable, const char *key, size_t key_len, json_
  *
  * @hashtable: The hashtable object
  * @key: The key
- * @key: The length of key
+ * @key_len: The length of key
  *
  * Returns value if it is found, or NULL otherwise.
  */
@@ -99,7 +98,7 @@ void *hashtable_get(hashtable_t *hashtable, const char *key, size_t key_len);
  *
  * @hashtable: The hashtable object
  * @key: The key
- * @key: The length of key
+ * @key_len: The length of key
  *
  * Returns 0 on success, or -1 if the key was not found.
  */
@@ -136,7 +135,7 @@ void *hashtable_iter(hashtable_t *hashtable);
  *
  * @hashtable: The hashtable object
  * @key: The key that the iterator should point to
- * @key: The length of key
+ * @key_len: The length of key
  *
  * Like hashtable_iter() but returns an iterator pointing to a
  * specific key.