allow the whole header to be passed into
magic commands.  previously, -R did not
work because c->header is inconsistently
maintained and parseheader always forced
a read.  this is fatal to some types of
redirection.

Reference: /n/sources/patch/maybe/httpd-magic
Date: Fri Nov  7 14:23:11 CET 2008
Signed-off-by: quanstro@quanstro.net

--- /sys/src/cmd/ip/httpd/init.c	Thu Jul 15 21:32:36 2010
+++ /sys/src/cmd/ip/httpd/init.c	Fri Nov  7 14:17:15 2008
@@ -6,7 +6,7 @@
 void
 usage(void)
 {
-	fprint(2, "usage: httpd [-b inbuf] [-d domain] [-r remoteip] [-w webroot] [-N netdir] [-R reqline] [-L logfd0 logfd1] method version uri [search]\n");
+	fprint(2, "usage: httpd [-b inbuf] [-d domain] [-r remoteip] [-w webroot] [-N netdir] [-R header] [-L logfd0 logfd1] method version uri [search]\n");
 	exits("usage");
 }
 
@@ -50,12 +50,13 @@
 		netdir = EARGF(usage());
 		break;
 	case 'L':
-		logall[0] = strtol(EARGF(usage()), nil, 10);
-		logall[1] = strtol(EARGF(usage()), nil, 10);
+		logall[0] = atoi(EARGF(usage()));
+		logall[1] = atoi(EARGF(usage()));
 		break;
 	case 'R':
 		s = EARGF(usage());
-		snprint((char*)connect.header, sizeof(connect.header), "%s", s);
+		connect.hin.stop = connect.hin.start + 
+			snprint((char*)connect.hin.start, sizeof connect.hin.buf, "%s", s);
 		break;
 	default:
 		usage();
--- /sys/src/libhttpd/gethead.c	Fri Nov  7 14:17:26 2008
+++ /sys/src/libhttpd/gethead.c	Fri Nov  7 14:17:24 2008
@@ -12,14 +12,15 @@
 {
 	Hio *hin;
 	char *s, *p, *pp;
-	int n;
+	int n, end;
 
 	hin = &c->hin;
 	for(;;){
+		end = 0;
 		s = (char*)hin->pos;
 		pp = s;
 		while(p = memchr(pp, '\n', (char*)hin->stop - pp)){
-			if(!many || p == pp || (p == pp + 1 && *pp == '\r')){
+			if(!many || (end = (p == pp || (p == pp + 1 && *pp == '\r')))){
 				pp = p + 1;
 				break;
 			}
@@ -32,7 +33,7 @@
 		memmove(c->hstop, s, n);
 		c->hstop += n;
 		*c->hstop = '\0';
-		if(p != nil)
+		if(p != nil || end)
 			return 0;
 		if(hreadbuf(hin, hin->pos) == nil || hin->state == Hend)
 			return -1;