package/libconfuse: use current upstream URL

https://github.com/martinh/libconfuse/ now redirects to
/libconfuse/libconfuse/, so use that instead in .mk and help text.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>

package/libconfuse/Config.in

@@ -8,4 +8,4 @@ config BR2_PACKAGE_LIBCONFUSE
 	  environment variable expansion, functions and nested include
 	  statements.
 
-	  https://github.com/martinh/libconfuse/
+	  https://github.com/libconfuse/libconfuse

package/libconfuse/libconfuse.mk

@@ -6,7 +6,7 @@
 
 LIBCONFUSE_VERSION = 3.3
 LIBCONFUSE_SOURCE = confuse-$(LIBCONFUSE_VERSION).tar.xz
-LIBCONFUSE_SITE = https://github.com/martinh/libconfuse/releases/download/v$(LIBCONFUSE_VERSION)
+LIBCONFUSE_SITE = https://github.com/libconfuse/libconfuse/releases/download/v$(LIBCONFUSE_VERSION)
 LIBCONFUSE_INSTALL_STAGING = YES
 LIBCONFUSE_CONF_OPTS = --disable-rpath
 LIBCONFUSE_LICENSE = ISC