Bump buidlroot version to 2018.02.6

bsp/buildroot/package/pppd/Config.in

@@ -11,8 +11,8 @@ config BR2_PACKAGE_PPPD
 if BR2_PACKAGE_PPPD
 
 config BR2_PACKAGE_PPPD_FILTER
-	select BR2_PACKAGE_LIBPCAP
 	bool "filtering"
+	select BR2_PACKAGE_LIBPCAP
 	help
 	  Packet filtering abilities for pppd. If enabled,
 	  the pppd active-filter and pass-filter options
@@ -23,6 +23,18 @@ config BR2_PACKAGE_PPPD_RADIUS
 	help
 	  Install RADIUS support for pppd
 
+config BR2_PACKAGE_PPPD_OVERWRITE_RESOLV_CONF
+	bool "overwrite /etc/resolv.conf"
+	default y
+	help
+	  Overwrite /etc/resolv.conf instead of maintaining the
+	  separate list of nameservers in /etc/ppp/resolv.conf
+
+	  Note that the pppd default of writing to /etc/ppp/resolv.conf
+	  does not work on a read-only rootfs unless you make it
+	  writable in your rootfs customizations (e.g. by linking it to
+	  a file in tmpfs or by mounting a writable filesystem on it).
+
 endif
 
 comment "pppd needs a uClibc or glibc toolchain w/ dynamic library"

bsp/buildroot/package/pppd/pppd.mk

@@ -7,7 +7,7 @@
 PPPD_VERSION = 2.4.7
 PPPD_SOURCE = ppp-$(PPPD_VERSION).tar.gz
 PPPD_SITE = https://download.samba.org/pub/ppp
-PPPD_LICENSE = LGPLv2+, LGPL, BSD-4c, BSD-3c, GPLv2+
+PPPD_LICENSE = LGPL-2.0+, LGPL, BSD-4-Clause, BSD-3-Clause, GPL-2.0+
 PPPD_LICENSE_FILES = \
 	pppd/tdb.c pppd/plugins/pppoatm/COPYING \
 	pppdump/bsd-comp.c pppd/ccp.c pppd/plugins/passprompt.c
@@ -41,7 +41,9 @@ PPPD_POST_EXTRACT_HOOKS += PPPD_DROP_INTERNAL_IF_PPOL2TP_H
 define PPPD_SET_RESOLV_CONF
 	$(SED) 's,ppp/resolv.conf,resolv.conf,' $(@D)/pppd/pathnames.h
 endef
+ifeq ($(BR2_PACKAGE_PPPD_OVERWRITE_RESOLV_CONF),y)
 PPPD_POST_EXTRACT_HOOKS += PPPD_SET_RESOLV_CONF
+endif
 
 define PPPD_CONFIGURE_CMDS
 	$(SED) 's/FILTER=y/#FILTER=y/' $(PPPD_DIR)/pppd/Makefile.linux