Username prefixes in IRC 2.9

The IRC server version 2.9 introduces more prefixes for username of of clients. Old 2.8 used prefix ~ for un-idented connections. Now the prefixes cover also restricted clients defined by i:lines, and OTHER type ident which is a special case of ident protocol.

Prefixes used are:

	none	I line with ident
	^	I line with OTHER type ident
	~	I line, no ident
	+	i line with ident
	=	i line with OTHER type ident
	-	i line, no ident