* encryption or keyed hash functions, it is simplest to define it in
* terms of keyblocks, and then supply a simple wrapper for the
* "normal" krb5_key-using interfaces. The keyblock interfaces are
- * useful for the biult-in arcfour code which constructs a lot of
+ * useful for the built-in arcfour code which constructs a lot of
* intermediate HMAC keys. For other back ends, it should not be
* necessary to supply the _keyblock versions of the hmac functions if
* the back end code doesn't make use of them.