Use common domain variable instead of blog_domain
Standardize apache’s 301 redirect to https, and enable HSTS
Simplified vars with better defaults
Use discovered IPv4 address
Fix znc download URL
This URL works for all releases, not just the latest one.
Create znc config directory
New vagrant-based development environment
Two small apache-related fixes
Merge commit 'aaa8a53633b33673011298d93f87342e4691ce45'
Added note on README about development environment.