main/rng-tools: upgrade to 6.11

remove fix-encrypt-name-clash.patch and stack.patch, fixed upstream
change (hard to notice) 'v' to 'V' in source url
7 jobs for !16620 with rng-tools-6.11 in 4 minutes and 39 seconds (queued for 2 seconds)
detached
Status Job ID Name Coverage
  Lint
passed #289007
docker-alpine x86_64
lint

00:00:20

 
  Build
passed #289012
docker-alpine ci-build aarch64
build-aarch64

00:01:04

passed #289013
docker-alpine ci-build armv7
build-armv7

00:01:06

passed #289011
docker-alpine ci-build ppc64le
build-ppc64le

00:01:13

passed #289010
docker-alpine ci-build s390x
build-s390x

00:00:54

passed #289009
docker-alpine ci-build x86
build-x86

00:00:35

passed #289008
docker-alpine ci-build x86_64
build-x86_64

00:00:37