These are needed to skip some tests when configure options have disabled certain features.
This makes the tests easier to copy and relocate to other test numbers without having to update content. Closes #6738
... so that Retry-After and other meta-content can still be used. Added 1634 to verify. Adjusted test 194 and 281 since --fail now also includes the header-terminating CRLF in the output before it exits. Fixes #6408 Closes #6409