Merge branch 'f-dot-in-username' into 'dev'

.gitlab-ci.yml

CMakeLists.txt

Makefile

conanfile.py

doc/CHANGELOG.md

include/CMakeLists.txt

include/caosdb/acm/user.h

include/caosdb/connection.h

src/CMakeLists.txt

src/caosdb/acm/user.cpp

src/caosdb/acm/user_impl.h

src/caosdb/connection.cpp

test/CMakeLists.txt

test/test_connection.cpp

test/test_user.cpp