Cameroon wrong delegation for com.cm

cameroon.cm

```
% check-soa -i cm
auth02.ns.uu.net.
	198.6.1.82: ERROR: SERVFAIL (112 ms)
benoue.camnet.cm.
	195.24.208.2: OK: 2019052303 (118 ms)
kim.camnet.cm.
	195.24.192.35: OK: 2019052303 (114 ms)
lom.camnet.cm.
	195.24.192.34: OK: 2019052307 (114 ms)
mbam.camnet.cm.
	195.24.192.33: OK: 2019052305 (114 ms)
ns-cm.afrinic.net.
	196.216.168.67: OK: 2019052307 (184 ms)
	2001:43f8:120::67: OK: 2019052307 (173 ms)
ns-cm.nic.fr.
	2001:678:c::1: OK: 2019052307 (1 ms)
	194.0.9.1: OK: 2019052307 (9 ms)
ns.itu.ch.
	156.106.192.121: OK: 2019052307 (42 ms)
	2a00:7580:60:2141::10: OK: 2019052307 (38 ms)
ns1.nic.cm.
	195.24.205.60: OK: 2019052307 (114 ms)
ns2.nic.cm.
	195.24.205.61: OK: 2019052307 (114 ms)
phloem.uoregon.edu.
	128.223.32.35: OK: 2019052307 (153 ms)
	2001:468:d01:20::80df:2023: OK: 2019052307 (158 ms)

% check-soa -i com.cm
a.cm.dyntld.net.
	162.88.52.7: OK: 2019052306 (9 ms)
	2600:2000:3000::7: OK: 2019052306 (10 ms)
b.cm.dyntld.net.
	162.88.53.7: OK: 2019052306 (9 ms)
	2600:2000:3001::7: OK: 2019052306 (10 ms)
ns1.nic.cm.
	195.24.205.60: ERROR: 0 answer (113 ms)
ns2.nic.cm.
	195.24.205.61: ERROR: 0 answer (114 ms)
```