int fuzzy_match(struct usersupp *us, char *matchstring);
-void process_rfc822_addr(char *rfc822, char *user, char *node, char *name);
+void process_rfc822_addr(const char *rfc822, char *user, char *node, char *name);
char *rfc822_fetch_field(char *rfc822, char *fieldname);
int IsDirectory(char *addr);