main/rsyslog: load custom config before standard rules

We must include config files before the standard rules or else
the standard logs will be full with data the user have configured
filters for.

This problem was introduced in:
 5364bae3 main/rsyslog: move config loading behind module loading to allow module directives in config files

(cherry picked from commit 2714c3af)
8 jobs for !22954 with 3.14-rsyslog-fix-user-filters in 7 minutes and 39 seconds (queued for 2 seconds)
latest detached
Status Job ID Name Coverage
  Lint
passed lint #432030
docker-alpine x86_64

00:00:24

 
  Build
passed build-aarch64 #432035
docker-alpine ci-build aarch64

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passed build-armhf #432037
docker-alpine ci-build armhf

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passed build-armv7 #432036
docker-alpine ci-build armv7

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passed build-ppc64le #432034
docker-alpine ci-build ppc64le

00:03:41

passed build-s390x #432033
docker-alpine ci-build s390x

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passed build-x86 #432032
x86 docker-alpine ci-build

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passed build-x86_64 #432031
docker-alpine ci-build x86_64

00:01:27