Plan 9 kernel fixes by Yoann Padioleau.

http://9fans.net/archive/2014/06/16
http://9fans.net/archive/2014/06/198
http://9fans.net/archive/2014/06/32
http://9fans.net/archive/2014/06/33
[9fans] bug in network stack regarding Ipht (2015-06-09)

sdiff /sys/src/9/port/devcons.c /sys/src/9/port/taslock.c /sys/src/9/pc/main.c | night
--- /n/sources/plan9/sys/src/9/port/devcons.c	Fri Jul 19 06:22:41 2013
+++ /sys/src/9/port/devcons.c	Wed Jun 18 00:00:00 2014
@@ -523,7 +523,7 @@
 kbdputc(Queue*, int ch)
 {
 	int i, n;
-	char buf[3];
+	char buf[UTFmax];
 	Rune r;
 	char *next;
 
--- /n/sources/plan9/sys/src/9/port/taslock.c	Mon Apr  8 18:18:51 2013
+++ /sys/src/9/port/taslock.c	Wed Jun 18 00:00:00 2014
@@ -80,6 +80,7 @@
 		l->pc = pc;
 		l->p = up;
 		l->isilock = 0;
+		l->m = MACHP(m->machno);
 #ifdef LOCKCYCLES
 		l->lockcycles = -lcycles();
 #endif
--- /n/sources/plan9/sys/src/9/pc/main.c	Tue Mar 11 19:49:31 2014
+++ /sys/src/9/pc/main.c	Wed Jun 18 00:00:00 2014
@@ -489,7 +489,7 @@
 		+ conf.nproc*sizeof(Proc)
 		+ conf.nimage*sizeof(Image)
 		+ conf.nswap
-		+ conf.nswppo*sizeof(Page);
+		+ conf.nswppo*sizeof(Page*);
 	mainmem->maxsize = kpages;
 	if(!cpuserver){
 		/*
--- /n/sources/plan9/sys/src/9/ip/ip.h	Tue Mar 18 21:32:41 2014
+++ /sys/src/9/ip/ip.h	Tue Jun  9 00:00:00 2015
@@ -37,7 +37,6 @@
 {
 	Addrlen=	64,
 	Maxproto=	20,
-	Nhash=		64,
 	Maxincall=	64,	/* max. conn.s in listen q not accepted yet */
 	Nchans=		1024,
 	MAClen=		16,		/* longest mac address */
--- /n/sources/plan9/sys/src/9/ip/ipaux.c	Thu Feb 28 20:38:48 2008
+++ /sys/src/9/ip/ipaux.c	Tue Jun  9 00:00:00 2015
@@ -238,7 +238,7 @@
 ulong
 iphash(uchar *sa, ushort sp, uchar *da, ushort dp)
 {
-	return ((sa[IPaddrlen-1]<<24) ^ (sp << 16) ^ (da[IPaddrlen-1]<<8) ^ dp ) % Nhash;
+	return ((sa[IPaddrlen-1]<<24) ^ (sp << 16) ^ (da[IPaddrlen-1]<<8) ^ dp ) % Nipht;
 }
 
 void