Fixed curl failing to build for Windows

Fixes following issue on Windows build
```
15:44:06 url.c: In function 'zonefrom_url':
15:44:06 url.c:1802:18: error: implicit declaration of function 'if_nametoindex' [-Werror=implicit-function-declaration]
15:44:06        scopeidx = if_nametoindex(zoneid);
15:44:06                   ^
```

Signed-off-by: Lars Erik Wik <[email protected]>
(cherry picked from commit 4512cfe)

Author: larsewi

deps-packaging/libcurl/debian/rules

@@ -26,6 +26,13 @@ build: build-stamp
 build-stamp:
 	dh_testdir
 
+	# Fixes following issue on Windows build
+	# 15:44:06 url.c: In function 'zonefrom_url':
+	# 15:44:06 url.c:1802:18: error: implicit declaration of function 'if_nametoindex' [-Werror=implicit-function-declaration]
+	# 15:44:06        scopeidx = if_nametoindex(zoneid);
+	# 15:44:06                   ^
+	if [ "$(OS)" = mingw ]; then patch -p1 < "$(CURDIR)"/fix-curl-windows.patch; fi
+
 	./configure --with-sysroot=$(PREFIX) \
 				--host=$(DEB_HOST_GNU_TYPE) \
 				$(PTHREAD) \
@@ -54,7 +61,7 @@ build-stamp:
 				CPPFLAGS="-I$(PREFIX)/include" \
 
 	make
-	
+
 	touch build-stamp
 
 install: build

deps-packaging/libcurl/fix-curl-windows.patch

@@ -0,0 +1,34 @@
+diff -ruN curl-8.15.0/configure curl-8.15.0-modified/configure
+--- curl-8.15.0/configure	2025-07-16 08:22:04.000000000 +0200
++++ curl-8.15.0-modified/configure	2025-07-21 16:35:32.470568787 +0200
+@@ -41895,12 +41895,20 @@
+   printf "%s\n" "#define HAVE_GETTIMEOFDAY 1" >>confdefs.h
+ 
+ fi
+-ac_fn_c_check_func "$LINENO" "if_nametoindex" "ac_cv_func_if_nametoindex"
+-if test "x$ac_cv_func_if_nametoindex" = xyes
+-then :
+-  printf "%s\n" "#define HAVE_IF_NAMETOINDEX 1" >>confdefs.h
+ 
+-fi
++# Below causes issues on Windows Build:
++#
++# 15:44:06 url.c: In function 'zonefrom_url':
++# 15:44:06 url.c:1802:18: error: implicit declaration of function 'if_nametoindex' [-Werror=implicit-function-declaration]
++# 15:44:06        scopeidx = if_nametoindex(zoneid);
++# 15:44:06                   ^
++
++# ac_fn_c_check_func "$LINENO" "if_nametoindex" "ac_cv_func_if_nametoindex"
++# if test "x$ac_cv_func_if_nametoindex" = xyes
++# then :
++#   printf "%s\n" "#define HAVE_IF_NAMETOINDEX 1" >>confdefs.h
++#
++# fi
+ ac_fn_c_check_func "$LINENO" "mach_absolute_time" "ac_cv_func_mach_absolute_time"
+ if test "x$ac_cv_func_mach_absolute_time" = xyes
+ then :
+@@ -48385,4 +48393,3 @@
+   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: ${curl_buildinfo}" >&5
+ printf "%s\n" "$as_me: ${curl_buildinfo}" >&6;}
+ fi
+-