Make configuration files use /var primarily

Created by: Balasankar C

Every writable configuration has to be moved to /var/lib so as to comply with Debian policy.

for gitlab

• nginx configuration files
• gitlab.yml
• database.yml

for diaspora - WIP

• nginx configuration files
• diaspora.conf
• database.yml

Also

• move whole config directory to /etc/diaspora like we do in gitlab