FS#4180 - dnsmasq-full issue with local name resolution

[openwrt-bot]

beko136:

• Device problem occurs on --> WRT1900AC V1
• Software versions of OpenWrt/LEDE release, packages, etc. --> OpenWRT 21.02.1, package dnsmasq-full 2.85-8
• Steps to reproduce
  After installing OpenWRT 21.02.1 and replacing shipped dnsmasq package with dnsmasq-full, there is an issue, that local DNS doesn't work and no name resolution for LAN devices is possible. As a consequnce TLS encryption can't no longer be used correctly (without certificate warnings). I'm using static IP addresses and host names using Luci menu Network - Hostnames. All worked very well with many former OpenWRT versions until upgrading 21.02.1. I did several attempts and the problem is reproducable.

Message in syslog:
dnsmasq: daemon.err dnsmasq[6363]: failed to load names from /tmp/hosts/dhcp.cfg01411c: Permission denied

Workaround:
There is on old bug report for OpenWRT/LEDE 19.0.7 [https://bugs.openwrt.org/index.php?do=details&task_id=3090], where the same or at least a similar problem seems to be reported. The workaround described (adding chmod in /init.d/dnsmasq) solved this issue at my site.