Re: Get rid of "Section.N.N.N" on DOCs

There are places where links are mixed, some of them are auto explanatory, some don't, like on See Also of VACUUM

vacuumdb, Section 19.10.2, Section 24.1.6, Section 27.4.5, Section 27.4.2

For that we need only put a "xreflabel" tag on that target link. 

I can create a patch for all of them, but I would like to know why it's done this way.