Enable IPv6 in meson build of libmicrohttpd under Windows

[veloman-yunkan]

Should fix kiwix/libkiwix#1144

Under Windows libmicrohttpd was being built with support for IPv6 disabled, which - according to debugging - was the main root cause of kiwix/libkiwix#1144. This PR should eliminate that problem.

[veloman-yunkan]

To test the effect of this PR with respect on kiwix-tools in a preexisting build tree

1. Update the kiwix-build package in the virtual environment
2. Remove libmicrohttpd directory from under both SOURCE and BUILD_native_static directories
3. kiwix-build --config native_static libmicrohttpd and verify that BUILD_native_static/libmicrohttpd/MHD_config.h has MHD_HAVE_INET6 #defined as 1
4. kiwix-build --config native_static kiwix-tools
5. Test kiwix-serve

[veloman-yunkan]

The failure of the CI / Windows (native_static) job looks like a glitch in a non-deterministic unit-test. I will rerun the job when the CI completes.

[veloman-yunkan]

The failure of the CI / Windows (native_static) job looks like a glitch in a non-deterministic unit-test. I will rerun the job when the CI completes.

Done. CI is clean.

[kelson42]

@veloman-yunkan But we need to trigger the rebuild of the dependency I guess? Maybe an opportunity to upgrade to a more recent version (not sure about how to make a simple rebuild of the same version)?

[sgourdas]

Works on my end as well. Nice.

[veloman-yunkan]

@veloman-yunkan But we need to trigger the rebuild of the dependency I guess?

Good point. Let me see how it can be done.

Maybe an opportunity to upgrade to a more recent version (not sure about how to make a simple rebuild of the same version)?

Let's not seek for trouble without any compelling reason. I will find a way to update the dependency.

[kelson42]

@veloman-yunkan Maybe just updating https://github.com/kiwix/kiwix-build/blob/main/kiwixbuild/versions.py#L36 and tagging appropriatly to trigger the rebuild would be enough?

[veloman-yunkan]

@veloman-yunkan Maybe just updating https://github.com/kiwix/kiwix-build/blob/main/kiwixbuild/versions.py#L36 and tagging appropriatly to trigger the rebuild would be enough?

@kelson42 Thanks for the hint. Did it in #762. It seems that no tagging is needed. The CI of that PR will create the updated base_deps archives and after the PR is merged the new deps will be used by the nightlies.