int mutt_extract_token (BUFFER *, BUFFER *, int);
BUFFER *mutt_buffer_init (BUFFER *);
-BUFFER *mutt_buffer_from (BUFFER *, char *);
+BUFFER *mutt_buffer_from (BUFFER *, const char *);
void mutt_buffer_free (BUFFER **);
void mutt_buffer_add (BUFFER *, const char *, size_t);
void mutt_buffer_addstr (BUFFER *, const char *);