Use pattern matching function

Use pattern matching function

The needle argument in this specific case is a pattern, which cannot be
matched by the "literal" string matcher strstr.

This can result in fsck calls like:

    e2fsck -a -y /dev/sda1

Which will then exit with an error like:

    e2fsck: Only one of the options -p/-a, -n or -y may be specified.

Hence, it is necessary to use the strglobin function to correctly match
the pattern.