nano: Update to 8.4

Update nano edit to version 8.4.

Add configure flags to overcome upstream bug 66978, where the newly added
gnulib module for strcasecmp always fails in the configure step when
cross-compiling.
https://savannah.gnu.org/bugs/?66978
b2927d1b1f

The added flags disable the strcasecmp function from gnulib.
If upstream (gnulib?) fixes things later, the flags should be removed.

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>
(cherry picked from commit 3d055f8dfb)

utils/nano/Makefile

@@ -8,12 +8,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=nano
-PKG_VERSION:=8.3
+PKG_VERSION:=8.4
 PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=@GNU/nano
-PKG_HASH:=551b717b2e28f7e90f749323686a1b5bbbd84cfa1390604d854a3ca3778f111e
+PKG_HASH:=5ad29222bbd55624d87ea677928b3106a743114d6c6f9b41f36c97be2a8e628d
 
 PKG_LICENSE:=GPL-3.0-or-later
 PKG_LICENSE_FILES:=COPYING
@@ -117,6 +117,8 @@ endif
 
 CONFIGURE_VARS += \
 	ac_cv_header_regex_h=no \
+	ac_cv_func_strcasecmp=no \
+	ac_cv_func_strncasecmp=no
 
 define Package/nano-plus/conffiles
 /etc/nanorc