Fixed some typos, courtesy of codespell

src/libradius/radius_client.h

@@ -30,7 +30,7 @@ typedef struct radius_client_t radius_client_t;
  * RADIUS client functionality.
  *
  * To communicate with a RADIUS server, create a client and send messages over
- * it. The client allocates a socket from the best RADIUS server abailable.
+ * it. The client allocates a socket from the best RADIUS server available.
  */
 struct radius_client_t {
 

src/libradius/radius_message.h

@@ -320,7 +320,7 @@ struct radius_message_t {
 radius_message_t *radius_message_create(radius_message_code_t code);
 
 /**
- * Parse and verify a recevied RADIUS message.
+ * Parse and verify a received RADIUS message.
  *
  * @param data			received message data
  * @return				radius_message_t object, NULL if length invalid