Reorganize content in order to make split easier
Reorganize content in order to make split easier

* Where needed, split sections into multiple single purpose sections.
* Update inline comments.

Ref: h5bp/server-configs-apache#38.

johnnyicarus/server-configs-apache,atyenoria/server-configs-apache,johnnyicarus/server-configs-apache,StephanieMak/server-configs-apache,walterebert/server-configs-apache,h5bp/server-configs-apache,walterebert/server-configs-apache,blackmoral/server-configs-apache,Gillespie59/server-configs-apache,voku/server-configs-apache,Gillespie59/server-configs-apache,sengkoil/server-configs-apache,StephanieMak/server-configs-apache,blackmoral/server-configs-apache,sengkoil/server-configs-apache,voku/server-configs-apache,atyenoria/server-configs-apache