Make sysstat disk counters consistent with those from latest kernel (3.5).

Make sysstat disk counters consistent with those from latest kernel (3.5).

Changed the type of some disk counters to keep in sync with latest 3.5
kernel.
This breaks the compatibility with older sar data files format for disk
activity.

Mail from Peter Schiffer (pschiffe@redhat.com) 15/02/2012:

I am sending you next patch. I've updated reading /proc/diskstats and
/sys/block/<disk>/stat files in iostat.c and rd_stats.c source files
according to latest kernel (3.2.6).

Problem was, that in case of very high I/O operations, sar -d and iostat
outputted overflowed values:

sar -d output:
09:20:01 PM       DEV       tps  rd_sec/s  wr_sec/s  avgrq-sz  avgqu-sz
await     svctm     %util
09:50:01 PM      sdb1   2986.02      0.05  34704.99     11.62   3355.91
1137.22      0.28     84.49
09:55:01 PM      sdb1   3284.08      0.21  32884.03     10.01   4556.98
1386.29      0.27     88.31
10:00:01 PM      sdb1   3260.33      0.19  31497.61      9.66
61474802782539.38
18855397092136.58      0.27     87.60
10:05:01 PM      sdb1   3373.57      0.08  32028.26      9.49   6069.53
1799.10      0.27     89.86

What do you think about the patch?