libxml2 is about to phase out support for the built-in HTTP client. You should wrap the call to xmlNanoHTTPCleanup in wfs_in.c with a check for the relevant feature macro:

#ifdef LIBXML_HTTP_ENABLED
    xmlNanoHTTPCleanup();
#endif

Or you could remove everything related to libxml2's HTTP client altogether. It never supported HTTPS and is mostly useless these days.

This already affects packaging in nixpkgs: https://github.com/NixOS/nixpkgs/issues/347085