Chapter/section about PHP configuration

[pforr1]

Hello.
Great project! From my point of view (php.net and) PHP The Right Way lacks of information how to configure a PHP runtime (SAPI).

• how to get the actual configuration, security considerations
• how does configuration work in context of shared hosting or enterprise networks, PHP runtime (SAPI), deployment environment
  • perhaps gotchas of setting the configuration (return value of ini_set())
• other settings for PHPs behaviour: Environment variables (Proxy settings), Locales (etc.?)

Bye

[matthewtrask]

If you want to make a PR to update the information, we will happily take a look at it.