a few header file nits

Reference: /n/atom/patch/applied2013/incnits
Date: Wed Jul 31 17:59:27 CES 2013
Signed-off-by: quanstro@quanstro.net

--- /sys/include/String.h	Wed Jul 31 17:59:05 2013
+++ /sys/include/String.h	Wed Jul 31 17:59:06 2013
@@ -42,4 +42,4 @@
 extern char	*s_rdinstack(Sinstack*, String*);
 extern Sinstack	*s_allocinstack(char*);
 extern void	s_freeinstack(Sinstack*);
-#endif BGETC
+#endif /* BGETC */
--- /sys/include/auth.h	Wed Jul 31 17:59:06 2013
+++ /sys/include/auth.h	Wed Jul 31 17:59:07 2013
@@ -35,7 +35,7 @@
 struct AuthRpc
 {
 	int afd;
-	char ibuf[AuthRpcMax+1];
+	char ibuf[AuthRpcMax+1];	/* +1 for NUL in auth_rpc.c */
 	char obuf[AuthRpcMax];
 	char *arg;
 	uint narg;
--- /sys/include/libc.h	Wed Jul 31 17:59:08 2013
+++ /sys/include/libc.h	Wed Jul 31 17:59:09 2013
@@ -45,7 +45,7 @@
 	Runesync	= 0x80,		/* cannot represent part of a UTF sequence (<) */
 	Runeself	= 0x80,		/* rune and UTF sequences are the same (<) */
 	Runeerror	= 0xFFFD,	/* decoding error in UTF */
-	Runemax	= 0x10FFFF,	/* 32 bit rune */
+	Runemax	= 0x10FFFF,	/* 21-bit rune */
 };
 
 /*
@@ -184,18 +184,23 @@
 #pragma	varargck	argpos	sprint		2
 
 #pragma	varargck	type	"lld"	vlong
+#pragma	varargck	type	"llo"	vlong
 #pragma	varargck	type	"llx"	vlong
 #pragma	varargck	type	"llb"	vlong
 #pragma	varargck	type	"lld"	uvlong
+#pragma	varargck	type	"llo"	uvlong
 #pragma	varargck	type	"llx"	uvlong
 #pragma	varargck	type	"llb"	uvlong
 #pragma	varargck	type	"ld"	long
+#pragma	varargck	type	"lo"	long
 #pragma	varargck	type	"lx"	long
 #pragma	varargck	type	"lb"	long
 #pragma	varargck	type	"ld"	ulong
+#pragma	varargck	type	"lo"	ulong
 #pragma	varargck	type	"lx"	ulong
 #pragma	varargck	type	"lb"	ulong
 #pragma	varargck	type	"d"	int
+#pragma	varargck	type	"o"	int
 #pragma	varargck	type	"x"	int
 #pragma	varargck	type	"c"	int
 #pragma	varargck	type	"C"	int
@@ -330,7 +335,6 @@
 extern	long	times(long*);
 extern	long	tm2sec(Tm*);
 extern	vlong	nsec(void);
-extern	int	bintime(int, vlong*, vlong*, vlong*);
 
 extern	void	cycles(uvlong*);	/* 64-bit value of the cycle counter if there is one, 0 if there isn't */