Prefer HTTPS in `M-x webjump´

* lisp/net/webjump.el (webjump-url-fix): Prefer HTTPS to HTTP.
(webjump-sites): Document the above change.
(webjump-sample-sites): Change some links to HTTP only.
1 job for master in 3 minutes and 33 seconds (queued for 7 seconds)
Status Job ID Name Coverage
  Normal
failed #75976
test-lisp-net-inotify

00:03:33

 
Name Stage Failure
failed
test-lisp-net-inotify Normal
Uploading artifacts for failed job
Uploading artifacts...
test-lisp-net-inotify-8fef7150/: found 27 matching files and directories

Uploading artifacts as "archive" to coordinator... 201 Created
id=75976 responseStatus=201 Created token=wU5YNz2B
Uploading artifacts...
test-lisp-net-inotify-8fef7150/junit-test-report.xml: found 1 matching files and directories

Uploading artifacts as "junit" to coordinator... 201 Created
id=75976 responseStatus=201 Created token=wU5YNz2B
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 2