'ioping -w 7 -i 2' was taking 8 seconds to run, not 7 or less.
Fix it by moving the check to before usleep(), and taking
the interval (ie usleep argument) into account.
Signed-off-by: Kir Kolyshkin <kir@openvz.org>

This commit addresses two similar (but distinct) bugs.

(1) 'ioping -c' was needlessly sleeping after the last iteration
(and before showing final stats). Fix it by moving the check
to before the usleep(), not after.

(2) 'ioping -w' was going over the time limit specified. For example,
'ioping -w 7 -i 2' was taking 8 seconds to run, not 7 or less.
Fix it by moving the check to before usleep(), and taking
the interval (ie usleep argument) into account.
Signed-off-by: Kir Kolyshkin <kir@openvz.org>

err(1, NULL) prints program name and errno string, which is
just what we need in this case.
Signed-off-by: Kir Kolyshkin <kir@openvz.org>

* free temp path string

getopt() already emits warning about unknown option, so if we do that, too,
the result will look like this:

	$ ./ioping -z
	./ioping: invalid option -- 'z'
	ioping: unknown option: -z

Don't warn about unknown option, instead show usage().
Signed-off-by: Kir Kolyshkin <kir@openvz.org>

Needed mostly for distro vendors (.spec writers etc.)

* Makefile: do not strip when installing
Otherwise distros could not produce debuginfo packages

* Makefile: add BINDIR
Signed-off-by: Kir Kolyshkin <kir@openvz.org>

Signed-off-by: Kir Kolyshkin <kir@openvz.org>