Fixes for `rndc nta` user interface

Tell the user explicitly about their mistakes:

* Unknown options, e.g. -list instead of -dump
  or -delete instead of -remove.

* Unknown view names.

* Excess arguments.

Include the view name in `rndc nta -dump` output, for consistency with
the NTA add and remove actions.

When removing an NTA from all views, do not abort with an error if the
NTA was not found in one of the views.
26 jobs for u/fanf2/rndc-nta-preen in 1 minute and 4 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Precheck
failed precheck:debian:sid:amd64 #60020
amd64 docker linux

00:01:04

 
  Build
skipped build:centos:centos6:amd64 #60021
amd64 docker linux
skipped build:centos:centos7:amd64 #60022
amd64 docker linux
skipped build:clang:debian:stretch:amd64 #60023
amd64 docker linux
skipped build:clang:debian:stretch:i386 #60027
i386 docker linux
skipped build:debian:jessie:amd64 #60024
amd64 docker linux
skipped build:debian:sid:amd64 #60026
amd64 docker linux
skipped build:debian:sid:i386 #60028
i386 docker linux
skipped build:debian:stretch:amd64 #60025
amd64 docker linux
skipped pkcs11:build:debian:sid:amd64 #60029
amd64 docker linux
 
  Test
skipped install:debian:sid:amd64 #60043
amd64 docker linux
skipped pkcs11:systemtest:debian:sid:amd64 #60045
amd64 docker linux
skipped pkcs11:unittest:debian:sid:amd64 #60044
amd64 docker linux
skipped systemtest:centos:centos6:amd64 #60037
amd64 docker linux
skipped systemtest:centos:centos7:amd64 #60038
amd64 docker linux
skipped systemtest:debian:jessie:amd64 #60039
amd64 docker linux
skipped systemtest:debian:sid:amd64 #60041
amd64 docker linux
skipped systemtest:debian:sid:i386 #60042
i386 docker linux
skipped systemtest:debian:stretch:amd64 #60040
amd64 docker linux
skipped unittest:centos:centos6:amd64 #60030
amd64 docker linux
skipped unittest:centos:centos7:amd64 #60031
amd64 docker linux
skipped unittest:clang:debian:stretch:amd64 #60035
amd64 docker linux
skipped unittest:debian:jessie:amd64 #60032
amd64 docker linux
skipped unittest:debian:sid:amd64 #60034
amd64 docker linux
skipped unittest:debian:sid:i386 #60036
i386 docker linux
skipped unittest:debian:stretch:amd64 #60033
amd64 docker linux
 
Name Stage Failure
failed
precheck:debian:sid:amd64 Precheck
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