Merge branch 'jc/skip-test-in-the-middle' into maint

Merge branch 'jc/skip-test-in-the-middle' into maint

A recent update to t5545-push-options.sh started skipping all the
tests in the script when a web server testing is disabled or
unavailable, not just the ones that require a web server.  Non HTTP
tests have been salvaged to always run in this script.

* jc/skip-test-in-the-middle:
  t5545: enhance test coverage when no http server is installed
  test: allow skipping the remainder