main/dovecot: security upgrade to 2.3.13

fixes:
 - CVE-2020-24386
 - CVE-2020-25275
add fix-out-of-memory-test.patch to fix test on musl

add patch posted to me by upstream author to fix failed tests on 32bit
arches
fixes #12274
7 jobs for !17379 with 3.11-stable-dovecot-cve-fixes in 30 seconds
detached
Status Job ID Name Coverage
  Lint
passed #303353
docker-alpine x86_64
lint

00:00:18

 
  Build
failed #303358
docker-alpine ci-build aarch64
build-aarch64

00:00:06

failed #303359
docker-alpine ci-build armv7
build-armv7

00:00:09

failed #303357
docker-alpine ci-build ppc64le
build-ppc64le

00:00:08

failed #303356
docker-alpine ci-build s390x
build-s390x

00:00:06

failed #303355
docker-alpine ci-build x86
build-x86

00:00:02

failed #303354
docker-alpine ci-build x86_64
build-x86_64

00:00:03

 
Name Stage Failure
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build-x86_64 Build
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build-armv7 Build
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build-s390x Build
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build-ppc64le Build
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build-x86 Build
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build-aarch64 Build
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