We used to generate configuration files for different Apache and

lighttpd server combinations, but over time we consolidated onto

Apache + mod_wsgi. This made sense at the time, but since then, the

world of Python web servers has changed.
We now generate a number of sample configurations for users:

Apache + mod_wsgi
Nginx + Gunicorn
Nginx + uWSGI

These all live in $sitedir/conf/webconfs/.
Each of these are documented, with commented-out options for common

configurations. For example, the Apache and Nginx configurations all

have details on enabling SSL, and the mod_wsgi section has a section on

daemon mode.
These are all auto-generated, so there's no need to select an option

when creating the site. The existing advanced option for the web server

is now deprecated and unused, and advanced mode no longer prompts about

the web server.
This change also fixes an annoying warning when failing to write the

global site list file (which in most cases is not useful), and adds a

blurb at the end about referring to the documentation for SELinux

instructions.

Generated site directories and tested each server combination, making

sure I could load Review Board.