mysqldumpslow: fix detection of slow log path #213
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Without an argument mysqldumpslow tries to derive the path of the
slow log from my_print_defaults, but that lists slow log like
$ my_print_defaults mysqld
...
--slow_query_log_file=/var/log/mysql/mysql-slow.log
Fix the script to search with underscores instead of a hyphen.
That way mysqldumpslow is most configurations will work without extra
arguments.
Fixes: https://bugs.launchpad.net/ubuntu/+source/mysql-5.7/+bug/819535
Signed-off-by: Christian Ehrhardt christian.ehrhardt@canonical.com