Environment variables

These environment variables define defaults for fields in the installer

NAMELESS_DEBUGGING (pr13+, set to anything to enable debugging)

NAMELESS_HOSTNAME
NAMELESS_HOSTNAME_HIDE (pr11+, set to anything to hide the option in the installer)
NAMELESS_PATH
NAMELESS_PATH_HIDE (pr11+, set to anything to hide the option in the installer)
NAMELESS_FRIENDLY_URLS
NAMELESS_FRIENDLY_URLS_HIDE (pr11+, set to anything to hide the option in the installer)

NAMELESS_DATABASE_ADDRESS
NAMELESS_DATABASE_PORT
NAMELESS_DATABASE_USERNAME
NAMELESS_DATABASE_PASSWORD
NAMELESS_DATABASE_NAME
NAMELESS_DATABASE_CHARSET
NAMELESS_DATABASE_ENGINE

NAMELESS_SITE_NAME
NAMELESS_SITE_CONTACT_EMAIL
NAMELESS_SITE_OUTGOING_EMAIL

NAMELESS_ADMIN_USERNAME
NAMELESS_ADMIN_EMAIL
NAMELESS_ADMIN_PASSWORD (pr13+, only used in CLI installer, not web installer)