This patch adds gettokens to lib.h; completely cosmetic.

Reference: /n/sources/patch/maybe/kernel-gettokens
Date: Thu Jul  4 10:43:11 CES 2013
Signed-off-by: sstallion@gmail.com

--- /sys/src/9/port/lib.h	Thu Jul  4 10:43:02 2013
+++ /sys/src/9/port/lib.h	Thu Jul  4 10:43:00 2013
@@ -132,6 +132,7 @@
 extern	char	edata[];
 extern	char	end[];
 extern	int	getfields(char*, char**, int, int, char*);
+extern	int	gettokens(char*, char**, int, char*);
 extern	int	tokenize(char*, char**, int);
 extern	int	dec64(uchar*, int, char*, int);
 extern	int	encodefmt(Fmt*);