community/whois: remove mkpasswd-doc subpackage

The general rule of thumb is: Only one -doc subpackage per package.

Enforcing this rules requires moving the install-mkpasswd Makefile
target to package() as documentation files (e.g. man pages) installed to
a $subpkgdir are not considered by the default_doc split function.
7 jobs for !12093 with whois-one-subpkg in 5 minutes and 1 second
latest detached
Status Job ID Name Coverage
  Lint
failed #199893
docker-alpine x86_64 allowed to fail
lint

00:00:23

 
  Build
passed #199898
docker-alpine ci-build aarch64
build-aarch64

00:00:38

passed #199899
docker-alpine ci-build armv7
build-armv7

00:01:01

passed #199897
docker-alpine ci-build ppc64le
build-ppc64le

00:00:59

passed #199896
docker-alpine ci-build s390x
build-s390x

00:00:54

passed #199895
docker-alpine ci-build x86
build-x86

00:00:32

passed #199894
docker-alpine ci-build x86_64
build-x86_64

00:00:36

 
Name Stage Failure
failed
lint Lint
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