mdnsd: fix reflector rule acceptance

[mischief]

c1e71dd (Initial attempt at a reflector., 2021-01-11) added reflector rule parsing, but didn't initialize the rule with the parsed accept/deny, leaving them to always be deny (i think).

assign the parsed value to the rule.

fixes the warning:

mdnsd.c:235:13: warning: variable 'accept' set but not used [-Wunused-but-set-variable]
  235 |         int htype, accept;
      |                    ^

[mischief]

note i didn't test the reflector/reflector rule parsing at all, this is only compile tested.