blockcheck: print some OPENWRT_xxx from /etc/os-release

blockcheck.sh

@@ -415,6 +415,9 @@ check_system()
 	[ -f /etc/os-release ] && {
 		. /etc/os-release
 		[ -n "$PRETTY_NAME" ] && echo "distro: $PRETTY_NAME"
+		[ -n "$OPENWRT_RELEASE" ] && echo "openwrt release: $OPENWRT_RELEASE"
+		[ -n "$OPENWRT_BOARD" ] && echo "openwrt board: $OPENWRT_BOARD"
+		[ -n "$OPENWRT_ARCH" ] && echo "openwrt arch: $OPENWRT_ARCH"
 	}
 	echo firewall type is $FWTYPE
 	echo CURL=$CURL

docs/changes.txt

@@ -552,6 +552,6 @@ nfqws: --dpi-desync-fakedsplit-mod=altorder  for fakedsplit/fakeddisorder
 nfqws: --dpi-desync-hostfakesplit-mod=altorder
 nfqws: fakedsplit/fakeddisorder normalize fake split pattern offset to reasm offset
 nfqws: optimize ipv4 ip_id. apply ip_id on all OS the same way.
-blockcheck: print PRETTY_NAME from /etc/os-release
+blockcheck: print PRETTY_NAME and some OPENWRT_xxx from /etc/os-release
 blockcheck: new strategies
 blockcheck: curl test simulation : SIMULATE=1