ongoing work on merging/reworking server and client trees

Makefile.server.dev

Makefile.server.prod

config/server/nexus-server

config/server/nexus-server.service

config/server/pki/.gitignore

config/server/pki/README.md

config/server/pki/ca.info

config/server/pki/gen-cert.sh

config/server/pki/server-generic.info

config/server/pki/server-nexus.info

config/server/users.json

docs/HOWTO_build.md

docs/README_client.md

docs/README_server.md

docs/distribs_install.md

docs/img/nexus-exam.png

docs/img/vmattach.jpg

docs/img/vmcred2pdf.png

src/client/cmdTemplate/helper.go

src/client/cmdTemplate/templateCreate.go