Only call libxml2's xmlNanoHTTPCleanup if libxml2's http support exists.
https://www.gaia-gis.it/fossil/libspatialite/tktview?name=7c452740fe
https://www.gaia-gis.it/fossil/libspatialite/tktview?name=e8f33aa9d8
https://www.gaia-gis.it/fossil/libspatialite/tktview?name=ac85f0fca3
https://groups.google.com/g/spatialite-users/c/FLBqJNIDkNQ
https://github.com/NixOS/nixpkgs/blob/571c71e6f73af34a229414f51585738894211408/pkgs/by-name/li/libspatialite/xmlNanoHTTPCleanup.patch
--- src/wfs/wfs_in.c.orig	2023-08-04 02:51:40.000000000 -0500
+++ src/wfs/wfs_in.c	2026-03-10 19:12:58.000000000 -0500
@@ -76,7 +76,9 @@
 #ifdef ENABLE_LIBXML2		/* LIBXML2 enabled: supporting XML documents */
 
 #include <libxml/parser.h>
+#ifdef LIBXML_HTTP_ENABLED
 #include <libxml/nanohttp.h>
+#endif
 
 #define MAX_GTYPES	28
 
@@ -4636,8 +4638,10 @@
 SPATIALITE_DECLARE void
 reset_wfs_http_connection (void)
 {
+#ifdef LIBXML_HTTP_ENABLED
 /* Resets the libxml2 "nano HTTP": useful when changing the HTTP_PROXY settings */
     xmlNanoHTTPCleanup ();
+#endif
 }
 
 #else /* LIBXML2 isn't enabled */