Close <pre> tag in 1.1 example code

- In the 1.1-check-solarium-and-ping.php example code, the <pre> tag is
  never closed after the var_dump. This fix closes the tag.
Merge pull request #268 from juergen-vogel/master

Excludes on stats
Merge pull request #261 from davechez/fix-example-1.1-pre-tag

Close <pre> tag in 1.1 example code
Support HTTPS Solr server

Fixes: #267
Merge commit 'b47b9cd21eaf75209da20cbc16d0740a130528f1' into develop
Support HTTPS Solr server

Fixes: #267