Reverting martin's commit from Mon, 29 Jan 2007 01:04:55 +0100 (CET) (changing spacing in kolab2.schema)

Reasons:

• RFC 2252 doesn't talk about files, just about the protocol on the wire.
• Everyone else uses tabs and not a single space, so this change doesn't make the schema file more uniform with others.
• This will cause inconveniences for people merging in their own changes. (And there are such changes as mentioned on kolab lists)