Add UCL language documentation.
Merge pull request #22 from fatalbanana/master

Fix some rpmlint warnings for openSUSE.
Fix '--pass-all' option name.
Include checksum in a map struct.
Add include_map macro to ucl language.
Log to console in case of config test.
Fix headers end detection for DKIM.
Fix one more sequence case.
Small fix to received parser.
Write general information about config.
Fix markdown.
Some more fixes.
Add settings description.
Fix markdown.
Fix image sizes.
Several fixes.
Add hostname attribute to rspamc protocol.
Show debug output in libraries.
Support hostname and helo in rspamc client.
Validate IP addresses before pushing them to lua.