Add ldap login
Do not use ldap test configuration by default
Fix user role
Extract realm name to constant
Fix stuff mentioned in the review comments
Merge branch 'feature-jaas-authentication' of github.com:skweez/forum into feature-jaas-authentication

Conflicts:
	src/main/java/net/skweez/forum/server/Main.java
Throw IlligalArgumentException and use caps for constant.
Just a new line (formatting)
Update javadoc.
Merge branch 'feature-jaas-authentication'