[PATCH 00/11] xfstests: rework src/randholes.c

[Alex Elder]

Dave's recent "dynamic speculative EOF preallocation" changes
caused test 008 to no longer produce the kinds of holes it was
expecting to see, so it got me looking at the program it uses,
"src/randholes.c".

Since 008 is the only test using this program, it probably
doesn't deserve the attention I gave it yesterday, but I've
done the work so I might as well submit the series for
review and get my changes in.

The first patch in the series actually addresses two things
that are bugs.

The remaining 10 are just cleanup and refactoring changes.
Other than two bug fix changes and one change in output
when running in very-verbose mode, the patched code should
be pretty much functionally identical to before.

					-Alex