[openwrt/openwrt] dnsmasq: add ignore hosts dir to dnsmasq init script

[LEDE Commits]

dedeckeh pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/e8a5670122e04574fdb5855ecd63d18f317c5bfd

commit e8a5670122e04574fdb5855ecd63d18f317c5bfd
Author: João Henriques <joaoh88 at gmail.com>
AuthorDate: Sun Apr 18 23:41:30 2021 +0100

    dnsmasq: add ignore hosts dir to dnsmasq init script
    
    When running multiple instances of dnsmasq, for example one being for the lan
    and another for a guest network, it might not be desirable to have the same dns names
    configured in both networks
    
    Signed-off-by: João Henriques <joaoh88 at gmail.com>
---
 package/network/services/dnsmasq/files/dnsmasq.init | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/package/network/services/dnsmasq/files/dnsmasq.init b/package/network/services/dnsmasq/files/dnsmasq.init
index 680e72f9e7..44e7d2d4f9 100644
--- a/package/network/services/dnsmasq/files/dnsmasq.init
+++ b/package/network/services/dnsmasq/files/dnsmasq.init
@@ -1012,7 +1012,12 @@ dnsmasq_start()
 
 	xappend "--dhcp-broadcast=tag:needs-broadcast"
 
-	xappend "--addn-hosts=$(dirname $HOSTFILE)"
+	config_get_bool ignore_hosts_dir "$cfg" ignore_hosts_dir 0
+	if [ "$ignore_hosts_dir" = "1" ]; then
+		xappend "--addn-hosts=$HOSTFILE"
+	else
+		xappend "--addn-hosts=$(dirname $HOSTFILE)"
+	fi
 
 	config_get dnsmasqconfdir "$cfg" confdir "/tmp/dnsmasq.d"
 	xappend "--conf-dir=$dnsmasqconfdir"