* testenv/Makefile.am: Add two new tests, Test-k.py and Test-https-k.py
* testenv/Test-k.py: New file. Add a test based on tests/Test-k.px
* testenv/Test-https-k.py: New file. Add a new test to ensure that the
protocol of the original host URL is retained when creatign absolute
links.
This test is added as a result of an issue reported on StackExchange:
https://superuser.com/questions/1348940/making-wgets-convert-links-respect-http-vs-https
