Added documentation, removed some options

docs/en/apache_install.rst

@@ -1,3 +1,39 @@
-=========================
-Installation with Apache
-=========================
+=============
+Apache setup
+=============
+
+Apache is slower, heavier and more complicated to setup than Nginx. But it's also
+much more famous:
+
+- more people will be able to help you on forums;
+- your hosting will most probably support Apache;
+- the configuration file syntax is familiar to a lot of people.
+
+An Apache setup is still much more robust and secure than an easy installation.
+
+Une installation apache est aussi beaucoup plus solide et sécurisé qu'une
+installation facile. You'll benefit from having:
+
+- the possiblity to have several projects listening to the port 80;
+- several Apache module at your disposal (like requests throttling);
+- Apache robustness in front end: it's secure, and there is much less chance
+  it will crash under heavy load;
+- your web site processes won't run with admin rights, even if --user doesn't
+  work on your OS.
+
+
+Mod_wsgi
+==========
+
+The modern Web Python servers all work the same way, following an norm for
+interfacing: WSGI.
+
+This is the most performante solution, and the best to use. But it will require
+the setup of the Apache module mod_wsgi. If you don't know how to do this, or
+if you can't do it (E.G: your hosting won't let you), you need to go for
+the CGI setup.
+
+==========
+
+This setup is considered as slow, but you will still benefit from Apache
+robustness.