mailfs: small fixes and plan 9 support

src/cmd/upas/nfs/fs.c

Index: src/cmd/upas/nfs/fs.c 
=================================================================== 
--- a/src/cmd/upas/nfs/fs.c 
+++ b/src/cmd/upas/nfs/fs.c 
@@ -93,6 +93,7 @@ 
 Qid rootqid; 
 ulong t0; 
 
+#ifdef PLAN9PORT 
 void 
 responderror(Req *r) 
 { 
@@ -101,6 +102,7 @@ 
	rerrstr(e, sizeof e); 
	respond(r, e); 
 } 
+#endif 
 
 int 
 qtype(Qid q) 
@@ -378,7 +380,8 @@ 
 { 
	char *t; 
	int len; 
- 
+ 
+	USED(q); 
	if(p->msg->part[0] == p) 
	t = p->rawbody; 
	else 
@@ -571,7 +574,7 @@ 
	fmtstrinit(&fmt); 
	if(part == msg->part[0]){ 
	if(msg->date) 
-	fmtprint(&fmt, "unixdate %lud %s", msg->date, ctime(msg->date)); 
+	fmtprint(&fmt, "unixdate %ud %s", msg->date, ctime(msg->date)); 
	if(msg->flags){ 
	filedata(Qflags, box, msg, part, pp, nil, freeme, 0, ZQ); 
	fmtprint(&fmt, "flags %s\n", buf); 
@@ -1202,7 +1205,8 @@ 
 fsrecv(void *v) 
 { 
	Req *r; 
- 
+ 
+	USED(v); 
	while((r = recvp(fsreqchan)) != nil){ 
	switch(r->ifcall.type){ 
	case Tattach: