void dav_delete_message(struct http_transaction *h, struct ctdlsession *c, long msgnum);
void dav_get_message(struct http_transaction *h, struct ctdlsession *c, long msgnum);
void dav_put_message(struct http_transaction *h, struct ctdlsession *c, char *euid, long old_msgnum);
void dav_delete_message(struct http_transaction *h, struct ctdlsession *c, long msgnum);
void dav_get_message(struct http_transaction *h, struct ctdlsession *c, long msgnum);
void dav_put_message(struct http_transaction *h, struct ctdlsession *c, char *euid, long old_msgnum);