int mutt_lookup_mime_type (BODY *, const char *);
int mutt_match_rx_list (const char *, RX_LIST *);
int mutt_messages_in_thread (CONTEXT *, HEADER *, int);
int mutt_lookup_mime_type (BODY *, const char *);
int mutt_match_rx_list (const char *, RX_LIST *);
int mutt_messages_in_thread (CONTEXT *, HEADER *, int);