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mothra: fix "bad ctl message" bug caused by fprint write buffer limit on long urls

--- a/sys/src/cmd/mothra/url.c

+++ b/sys/src/cmd/mothra/url.c

@@ -45,7 +45,7 @@

 static int

 webclone(Url *url, char *buf, int nbuf)

 {

-	int n, fd;

+	int n, conn, fd;

 	snprint(buf, nbuf, "%s/clone", mtpt);

 	if((fd = open(buf, ORDWR)) < 0)

@@ -55,16 +55,19 @@

 		return -1;

 	}

 	buf[n] = 0;

-	n = atoi(buf);

-	snprint(buf, nbuf, "%s/%d", mtpt, n);

+	conn = atoi(buf);

 	if(url && url->reltext[0]){

-		if(url->basename[0])

-			fprint(fd, "baseurl %s", url->basename);

-		if(fprint(fd, "url %s", url->reltext) < 0){

+		if(url->basename[0]){

+			n = snprint(buf, nbuf, "baseurl %s", url->basename);

+			write(fd, buf, n);

+		}

+		n = snprint(buf, nbuf, "url %s", url->reltext);

+		if(write(fd, buf, n) < 0){

 			close(fd);

 			return -1;

 		}

 	}

+	snprint(buf, nbuf, "%s/%d", mtpt, conn);

 	return fd;

 }

-- 

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