update check_rbl to 1.3.2

this is a mere documentation update, but having the latest version is always good
dsa-check-cert-expire: Make timers configurable

Closes: #744248
update dsa checks
update dsa-chack-packages

Closes: #744922
check_varnish: add support for varnish 4

Closes: #745895
Fix plugin name generation.
Merge pull request #46 from evgeni/check_rbl_132

update check_rbl to 1.3.2
Merge pull request #47 from evgeni/dsa

update dsa checks
Merge pull request #48 from evgeni/varnish4

check_varnish: add support for varnish 4
Merge remote-tracking branch 'github/master'
Updating changelog
Update control file to reflect the shiped check_rbl version 1.3.2