Pull request for bug #55 - logwatch tries to open log files it does not have access to / op did not request

The change does not impact existing users / the defaults preserve the same (old) logic.

https://sourceforge.net/p/logwatch/git/merge-requests/3/

https://sourceforge.net/u/jpyeron/logwatch/ci/6c1a2c2397981d4a841fd6e772f4bdc493e392de/

https://sourceforge.net/u/jpyeron/logwatch/ci/issue-55/

Moved the hard coded list from the:

foreach my $dir ("$Config{'logdir'}/", "/var/adm/", "/var/log/", "")

to a computed array. The array omits any of the search paths if so configured:

push @LogDirs, "/var/adm/" if $Config{'appendvaradmtologdirs'};
push @LogDirs, "/var/log/" if $Config{'appendvarlogtologdirs'};
push @LogDirs, "" if $Config{'appendcwdtologdirs'};

the defaults for the config, ensures no action includes them:

$Config{'appendvaradmtologdirs'} = 1;
$Config{'appendvarlogtologdirs'} = 1;
$Config{'appendcwdtologdirs'} = 1;

commit 6c1a2c2397981d4a841fd6e772f4bdc493e392de
Author: Jason Pyeron <[email protected]>
Date:   Sun Dec 4 14:12:48 2016 -0500

    bug #55: adds 3 configuration options to surpress hard coded search path

    * AppendVarAdmToLogDirs
    * AppendVarLogToLogDirs
    * AppendCWDToLogDirs

-Jason

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