v3.4 released

mostly minor fixes but the rc file format change is in now.

Also, I souped up the refex-expr a bit; here's a teaser:

  * user u2 is allowed to push either 'doc/' or 'src/' but not both

        repo    foo
            RW+                         =   u1 u2 u3

            RW+ VREF/NAME/doc/                      =   u2
            RW+ VREF/NAME/src/                      =   u2
            -   VREF/NAME/doc/ and VREF/NAME/src/   =   u2

Interested people can take a look at src/VREF/refex-expr for details
https://github.com/sitaramc/gitolite/blob/master/src/VREF/refex-expr

-- 
Sitaram