rcs_rev_setlog
if (rcs_rev_setlog(cf->file_rcs, rev, logmsg) < 0) {
int rcs_rev_setlog(RCSFILE *, RCSNUM *, const char *);
int rcs_rev_setlog(RCSFILE *, RCSNUM *, const char *);
if (rcs_rev_setlog(file, logrev, logmsg) < 0) {