Merge branch '2-support-centos8' into 'devel'

external/phobos/ChangeLog

external/phobos/Makefile.am

external/phobos/README.developer

external/phobos/README.md

external/phobos/README.md

external/phobos/autotools/m4/ax_python_devel.m4

external/phobos/ci/run-ci.sh

external/phobos/configure.ac

external/phobos/doc/README.md

external/phobos/doc/cfg/template.conf

external/phobos/doc/design/adapters.txt

external/phobos/doc/design/dss_filters.txt

external/phobos/phobos.spec.in

external/phobos/scripts/checkpatch-to-gerrit-json.py

external/phobos/scripts/checkpatch.pl

external/phobos/scripts/phobos_db

external/phobos/src/admin/admin.c

external/phobos/src/cfg/cfg.c

external/phobos/src/cli/Makefile.am

external/phobos/src/cli/phobos/cli.py