fuse: add MaxPages to INIT debug output

A later commit will allow setting MaxPages, so show it in the debug output.

Also print MaxReadahead, MaxWrite, TimeGran in decimal instead of hex -
these are neither bitfields nor addresses, so it seems clearer to have them in decimal.

Before:

22:03:50.020645 rx 2: INIT n0 {7.34 Ra 0x20000 PARALLEL_DIROPS,ASYNC_READ,EXPORT_SUPPORT,AUTO_INVAL_DATA,READDIRPLUS,NO_OPEN_SUPPORT,NO_OPENDIR_SUPPORT,EXPLICIT_INVAL_DATA,POSIX_LOCKS,DONT_MASK,SPLICE_READ,ASYNC_DIO,WRITEBACK_CACHE,HANDLE_KILLPRIV,CACHE_SYMLINKS,SPLICE_WRITE,SPLICE_MOVE,FLOCK_LOCKS,IOCTL_DIR,READDIRPLUS_AUTO,ABORT_ERROR,ATOMIC_O_TRUNC,BIG_WRITES,POSIX_ACL,MAX_PAGES,0x30000000}
22:03:50.020665 tx 2:     OK, {7.28 Ra 0x20000 AUTO_INVAL_DATA,READDIRPLUS,NO_OPEN_SUPPORT,PARALLEL_DIROPS,ASYNC_READ,MAX_PAGES,BIG_WRITES 0/0 Wr 0x2000 Tg 0x0}

After:

22: 02:51.374635 rx 2: INIT n0 {7.34 Ra 131072 POSIX_LOCKS,ATOMIC_O_TRUNC,DONT_MASK,FLOCK_LOCKS,AUTO_INVAL_DATA,READDIRPLUS_AUTO,PARALLEL_DIROPS,MAX_PAGES,ASYNC_READ,EXPORT_SUPPORT,BIG_WRITES,SPLICE_WRITE,SPLICE_READ,HANDLE_KILLPRIV,WRITEBACK_CACHE,CACHE_SYMLINKS,NO_OPENDIR_SUPPORT,EXPLICIT_INVAL_DATA,SPLICE_MOVE,IOCTL_DIR,READDIRPLUS,ASYNC_DIO,NO_OPEN_SUPPORT,POSIX_ACL,ABORT_ERROR,0x30000000}
22: 02:51.374656 tx 2:     OK, {7.28 Ra 131072 ASYNC_READ,BIG_WRITES,READDIRPLUS,NO_OPEN_SUPPORT,PARALLEL_DIROPS,AUTO_INVAL_DATA,MAX_PAGES 0/0 Wr 8192 Tg 0 MaxPages 2}
Change-Id: Iea02ad3270615d019413b3306e8a8e7282cd7c52

fuse/print.go

@@ -161,17 +161,17 @@ func (in *OpenOut) string() string {
 }
 
 func (in *InitIn) string() string {
-	return fmt.Sprintf("{%d.%d Ra 0x%x %s}",
+	return fmt.Sprintf("{%d.%d Ra %d %s}",
 		in.Major, in.Minor, in.MaxReadAhead,
 		flagString(initFlagNames, int64(in.Flags), ""))
 }
 
 func (o *InitOut) string() string {
-	return fmt.Sprintf("{%d.%d Ra 0x%x %s %d/%d Wr 0x%x Tg 0x%x}",
+	return fmt.Sprintf("{%d.%d Ra %d %s %d/%d Wr %d Tg %d MaxPages %d}",
 		o.Major, o.Minor, o.MaxReadAhead,
 		flagString(initFlagNames, int64(o.Flags), ""),
 		o.CongestionThreshold, o.MaxBackground, o.MaxWrite,
-		o.TimeGran)
+		o.TimeGran, o.MaxPages)
 }
 
 func (s *FsyncIn) string() string {