Merge inspircd_{config,version}.h into a single header file.
Merge pull request #472 from SaberUK/master+merge-headers

Merge inspircd_{config,version}.h into a single header file.
Purge the 1.1 config deprecations.
Add the ability to deprecate config values as well as keys.
Merge pull request #474 from SaberUK/master+better-config-deprecation

Improve the config deprecation system.
Default to the XML config format.
Merge pull request #475 from SaberUK/master+default-to-xml-config

Default to the XML config format.
Added blocking feature to m_messageflood, requested in #469
Updated helpop files to show ~
Missed a ~