knot: disable libcap-ng

Recently, there was added libcap-ng to OpenWrt packages feed,
which is optional for Knot DNS. It enables POSIX 1003.1e capabilities.
This can restrict root (by default it runs as root) permissions and
might harm and as there isn't systemd on OpenWrt it can interfere.

There is an added patch, which introduced an option to disable libcap-ng.
This will be part of the next release.

Signed-off-by: Josef Schlehofer <pepe.schlehofer@gmail.com>
(cherry picked from commit 41957d6967)

net/knot/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=knot
 PKG_VERSION:=2.9.3
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=https://secure.nic.cz/files/knot-dns/
@@ -149,6 +149,7 @@ export KNOT_VERSION_FORMAT=release
 
 CONFIGURE_ARGS += 			\
 	--enable-recvmmsg=no		\
+	--enable-cap-ng=no            	\
 	--disable-fastparser		\
 	--without-libidn		\
 	--with-rundir=/var/run/knot	\