configure script no longer honors exclusions

[chowbok]

Describe the bug

Trying to run the configure script without libxml2 or xmlsec1 on the system fails, even when specifying --without-xml2 or --without-xmlsec1. It still says to specify those options, even if you already have.

This bug was introduced sometime between 12.3.5 and 12.4.0.

Reproduction steps

./configure --without-xml2

Expected behavior

Should successfully configure

Additional context

No response

[zhoumgh]

VGAuthService needs libxml2 and xmlsec dev header and lib files. Without them, you can't build OVT.

[chowbok]

It probably shouldn't offer those as options, then.