When we try to add additional membership in `foo`, `bar` and `baz` groups to
the dnsmasq user via `USERID` variable, we're supposed to do so via comma
separated delimiter:
```
USERID:=dnsmasq=453:dnsmasq=453:foo,bar,baz
```
thus the `USERID` variable now contains comma separated values which Make
parses/interprets as separate arguments of the underlying `addfield`
function/macro, but they should be passed verbatim, otherwise we get
content in the `/etc/group`:
```
dnsmasq❌453:dnsmasq
fooSourceDateEpoch❌65536:dnsmasq
```
and `dnsmasq.control` files mangled:
```
Require-User: dnsmasq=453:dnsmasq=453:fooSourceDateEpoch: 1697028391
```
So lets fix it by making the expansion of `USERID` happening in the `addfield`
function/macro as expected.
Upstream-Status: Pending [https://github.com/openwrt/openwrt/pull/14337]
Signed-off-by: Cedric DOURLENT <cedric.dourlent@softathome.com>
(cherry picked from commit 108af4a7bec74151822a539a75de2c76e7f2c295)
b894180817
