Don't sync before exiting drivers.

Wipe inodes of pipes in truncate_inode(), to avoid the size remaining
at PIPE_SIZE causing pipes to break.

servers/fs/link.c

@@ -404,6 +404,7 @@ off_t newsize;			/* inode must become this size */
 
   /* Next correct the inode size. */
   if(!waspipe) rip->i_size = newsize;
+  else wipe_inode(rip);	/* Pipes can only be truncated to 0. */
   rip->i_dirt = DIRTY;
 
   return OK;

servers/fs/misc.c

@@ -258,9 +258,6 @@ PUBLIC int do_reboot()
   /* Only PM may make this call directly. */
   if (who != PM_PROC_NR) return(EGENERIC);
 
-  /* Sync before the drivers die. */
-  do_sync();
-
   /* Do exit processing for all leftover processes and servers. */
   for (i = 0; i < NR_PROCS; i++) { m_in.slot1 = i; do_exit(); }