Update man page

Fix verifysort typo, broken formatting after roundrobin and tidy up some
grammar.

Signed-off-by: Sitsofe Wheeler <sitsofe@yahoo.com>
Update man page

Many of fio's options are not described in the man page. Copy the short
text to the man page for those commands listed by:

./fio --cmdhelp=all | sed 's/ *:.*$//' | sed 's/ \+//' \
| while read line; do grep "\b$line\b" -q fio.1; if [[ $? -eq 1 ]]; then \
echo $line; fi; done

Signed-off-by: Sitsofe Wheeler <sitsofe@yahoo.com>
log: disable log, if realloc fails

Right now we just segfault, if realloc() returns NULL. Handle
this a bit more gracefully, by just disabling logging if that
happens. Fio will also print an error for that case.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
Merge branch 'manpage' of https://github.com/sitsofe/fio
man page: correct typoe

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