Item12937: Fix Perl 5.20 errors

Useless use of greedy match in a regex.

Log rotate fails with uninitialized error if at EOF when
slurping up rest of logs.

git-svn-id: http://svn.foswiki.org/trunk/core@17748 0b4bb1d4-4e5a-0410-9cc4-b2b747904278