/*** addresses ***/
-address_t *mutt_parse_adrlist (address_t *, const char *);
-address_t *address_dup(address_t *addr);
-address_t *address_list_dup(address_t *addr);
+address_t *mutt_parse_adrlist(address_t *, const char *);
+address_t *address_dup(const address_t *addr);
+address_t *address_list_dup(const address_t *addr);
void rfc822_qualify(address_t *, const char *);
address_t *rfc822_parse_adrlist(address_t *, const char *s);