When looking for setuid files, call find with -print0 and xargs with -0. This allows find to pass files with "illegal" characters to xargs in a safe manner.
When looking for setuid files, call find with -print0 and xargs with -0.
This allows find to pass files with "illegal" characters to xargs in a
safe manner.

Note: due to the manner in which the file names are now passed between
find and xargs, the files are now sorted differently than before.
The first /etc/security run after installing this change may result
in a lot of output when nothing did in fact change.

Closes PR# 1910.

2.2 candidate.

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