ignore locale-archive in check_libs

thanks h01ger!
revert nagios-check-libs source back to the original config path

patch our version only once, but with the correct path
update nagios-check-libs to the latest upstream version
update check_libs checksum in control
check_libs: add /var/lib/nginx/ to the ignorelist
Auto update of debian/copyright
Auto update of debian/control
Add percona nagios plugins.
Suggest percona-toolkit as Suggests.
Updaring changelog.