StrBuf *fetch_ical(struct ctdlsession *, long);
void cal_multiget_out(long, StrBuf *, StrBuf *, StrBuf *);
void caldav_report_one_item(struct http_transaction *, struct ctdlsession *, StrBuf *, StrBuf *);
-int caldav_apply_one_filter(void *, char *);
-int caldav_apply_filters(void *, Array *);
void caldav_report(struct http_transaction *, struct ctdlsession *);
// ctdlclient.c