Add notes to rax_dns and rax_dns_record to recommend using serial: 1
Merge pull request #7501 from sivel/rax-dns-serial-doc

Add notes to rax_dns and rax_dns_record to recommend using serial: 1
Fix typo requird -> required
Merge pull request #7514 from Xerkus/patch-2

Fix typo requird -> required
New apache2_site module

This module wraps the a2ensite and a2dissite commands to manage Apache2
site configurations.  Very much inspired from the apache2_module module.
Merge branch 'a2ensite'