Merge pull request linkchecker#594 from cjmayo/rel1010

Release 10.1.0

Merge pull request linkchecker#531 from cjmayo/rel10.0.1

Release 10.0.1

Merge pull request linkchecker#527 from cjmayo/rel10

Release 10

linkchecker Debian release 9.4.0-2

linkchecker Debian release 9.4.0-1

prepare 9.4.0 release

fix HTTPS URL checks

in Debian Jessie, linkchecker fails because of an API problem.

it completely breaks HTTPs checks.

this patch fixes the problem

from https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=772947

Add documentation

Add documentation

Updated website version

[ci skip]