Add filename_format option

Allows the user to set how fio should generate the file names
used by jobs. The default is $jobname.$jobnumber.$filenumber
as it always has been, but now it's configurable as well. See
the included documentation.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
Add strcasestr()

We'll need it for the next commit, if the platform does not
provide it.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
Use strcasestr() for matching filename_prefix keywords

Signed-off-by: Jens Axboe <axboe@kernel.dk>
Man page formatting fixups

- Fix extra .B in the filename_format section
- Fix missing .RE for lockfile

Signed-off-by: Jens Axboe <axboe@kernel.dk>
Makefile: use ginstall on Solaris

Regular install just doesn't seem to like man pages?!

Signed-off-by: Jens Axboe <axboe@kernel.dk>
Fio 2.0.15

Signed-off-by: Jens Axboe <axboe@kernel.dk>
Merge branch 'next'