_wait_for_rcode adds extraneous query

The file name is also queried for

% more catz/dig.out.test20

; <<>> DiG 9.15.6 <<>> -p 6200 @10.53.0.1 SOA dom3.example. dig.out.test20
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 49825
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
; COOKIE: 552f143ecf928ed7010000005df01a16958efc13984e1f65 (good)
;; QUESTION SECTION:
;dom3.example.                  IN      SOA

;; ANSWER SECTION:
dom3.example.           3600    IN      SOA     . . 1 3600 3600 3600 3600

;; Query time: 12 msec
;; SERVER: 10.53.0.1#6200(10.53.0.1)
;; WHEN: Tue Dec 10 22:20:06 UTC 2019
;; MSG SIZE  rcvd: 103

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: REFUSED, id: 38697
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
; COOKIE: 552f143ecf928ed7010000005df01a16958efc13984e1f65 (good)
;; QUESTION SECTION:
;dig.out.test20.                        IN      SOA

;; Query time: 8 msec
;; SERVER: 10.53.0.1#6200(10.53.0.1)
;; WHEN: Tue Dec 10 22:20:06 UTC 2019
;; MSG SIZE  rcvd: 71

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