Change 'SERVER_NAME' to 'HTTP_HOST'

to avoid things like '*.domain.com' in addresses with wildcard

Signed-off-by: Peter Legierski <peter@legierski.net>
Add isset() to avoid issues when executed via cron

Signed-off-by: Peter Legierski <peter@legierski.net>
Bumping up version

Signed-off-by: Peter Legierski <peter@legierski.net>
Merge branch 'refs/heads/hotfix-page-address'