Changelog for check_certificate_validity-1.0-3.26.noarch.rpm :

* Tue Apr 19 2016 drahtAATTschaltsekun.de- use SNI with s_client to retrieve certificate.
* Fri Apr 08 2016 drahtAATTschaltsekun.de- apparently, a break statement within a case enclosure causes variables to get lost with bash. => break statement removed.- default port set if only host name is set on cmdline.
* Fri Apr 08 2016 drahtAATTschaltsekun.de- first version of script and package