increase iounit on the file server to 48k.  also sync LRES for
profiling with other kernels.

Reference: /n/atom/patch/applied2013/fsbigiounit
Date: Sun Jul 28 02:39:46 CES 2013
Signed-off-by: quanstro@quanstro.net

--- /sys/src/fs/port/portdat.h	Sun Jul 28 02:38:46 2013
+++ /sys/src/fs/port/portdat.h	Sun Jul 28 02:38:47 2013
@@ -35,9 +35,8 @@
 #endif			/* OLD */
 
 /* constants that don't affect disk layout */
-#define	MAXDAT		8192		/* max allowable data message */
+#define	MAXDAT		49152		/* max allowable data message */
 #define	MAXMSG		128		/* max size protocol message sans data */
-#define	OFFMSG		60		/* offset of msg in buffer */
 
 /* more fundamental types */
 typedef vlong Wideoff; /* type to widen Off to for printing; ≥ as wide as Off */
@@ -52,7 +51,7 @@
 	Maxword = 200,			/* max bytes per command-line word */
 };
 #define NTLOCK		200		/* number of active file Tlocks */
-#define	LRES		3		/* profiling resolution */
+#define	LRES		0		/* profiling resolution */
 #define NATTID		10		/* the last 10 ID's in attaches */
 
 /*