tftpd: apply sstallion's tftpd-rfc patch (from sources)

tftpd option handling is not RFC-compliant. This causes picky
clients (such as curl) to fail transfers.

diff --git a/sys/src/cmd/ip/tftpd.c b/sys/src/cmd/ip/tftpd.c
index c39f2173dcbf953af2701f183e6f90ae5d89ae60..9b543a29e51babdc9a74c4a3d3e5579bbccbce6a 100644 (file)
--- a/sys/src/cmd/ip/tftpd.c
+++ b/sys/src/cmd/ip/tftpd.c
@@ -342,9 +342,6 @@ options(int fd, char *buf, int bufsz, char *file, ushort oper, char *p, int dlen
 
        if (bp + 3 >= ep)
                return -1;
-       *bp++ = '\0';
-       *bp++ = '\0';                   /* overkill */
-       *bp++ = '\0';
 
        if (write(fd, buf, bp - buf) < bp - buf) {
                syslog(dbg, flog, "tftpd network write error on oack to %s: %r",