Cleanup after 32451.

Part of 32451.

Remove more duplicate code.
Eliminate some arguments.
Rewrite some comments.

Cleanup after 32451.

Remove duplicate code, and standardise similar behaviour.
Add some additional error checking.

Cleanup after 32451.

Part of 32451.

Make spacing, quotes, and env vars consistent.

Cleanup after 32451 and 32468.

When we added the $FILTER for Windows newlines, we made
the pipeline always exit successfully, even if tor failed.

Fixes bug 32468; bugfix on 0.4.2.1-alpha.

Part of 32451.

The "expected_log" file is a set of patterns that matches the
output of "tor --verify-config". Unlike "error", it expects a
successful exit status.

Part of 32451.

Part of 32451.

There are lots of different files now, so having Config and Result
sections is helpful.

Part of 32451.

These tests will also pass on 0.4.3, with the original implementation,
and with the new implementation in 32404.

Part of 32295 and 32404.

"git merge --strategy ours", because:
* 32295 is a quick fix for 0.4.2 only
* 32404 has a better implementation for master

This is a basic fix for 0.4.2 only. The fix for 0.4.3 and later
is in 32404.

Fixes bug 32295; bugfix on 0.4.2.1-alpha.

Install the mingw OpenSSL package in Appveyor. This makes sure that
the OpenSSL headers and libraries match in Tor's Appveyor builds.

(This bug was triggered by an Appveyor image update.)

Fixes bug 32449; bugfix on 0.3.5.6-rc.

And document the "%include" behaviour.

Closes 32450.

It no longer warns, and is now defined in terms of an "IGNORE" type.

(The "IGNORE" type is the same as "OBSOLETE", except that it is not
reported as obsolete. It should be useful for disabled modules.)

Closes ticket 32404.

Part of 32404.