fix Socket6 import conflict messages

The cron job would spit out:
Subroutine main::pack_sockaddr_in6 redefined at /usr/share/perl5/5.18.1/Exporter.pm line 66.  at /usr/bin/mrtg line 101.
Subroutine main::unpack_sockaddr_in6 redefined at /usr/share/perl5/5.18.1/Exporter.pm line 66.  at /usr/bin/mrtg line 101.
Subroutine main::sockaddr_in6 redefined at /usr/share/perl5/5.18.1/Exporter.pm line 66.  at /usr/bin/mrtg line 101.

with current Th Perl.

The mrtg-Socket6_conflicts.patch fixes that.
A similar patch to perl-SNMP_Session fixes more of those messages.

Release: 7