minor wiki fixes

[Hugo Meiland]

> while trying to play with afs and afs-server I found that some fixes
> to wiki pages may be done:
> -----
> At http://wiki.freebsd.org/afs :
> "Arla installation through ports", the fourth command should be
> #> cd ports/net/arla-devel
> (change the port's directory from arla to arla-devel)
>
> At http://wiki.freebsd.org/afs-server :
> "OpenAFS server", the second command should be
> #> fetch http://setfilepointer.com/pub/afs/FreeBSD/openafs-server.tgz
> (add the command "fetch" and change the file suffix from .tar.gz to
> .tgz)
>
> after previous command another command should be added:
> #>tar zxvf openafs-server.tgz
> -----
>   
has been modified... thanks for the input!

Hugo Meiland