Make blog namespace for ircwiki

requested on IRC.
install nfs-common on all nfs clients
add prod8 to nfs
Fix error

Per JohnFLewis' comment on commit 8af92de6aba6ed8c68aed1eb70ef13d89b02a8be
Merge pull request #375 from revi/ircwiki

Make blog namespace for ircwiki
Use www. for now
Add www to domain for wikiconstitucio
Add and use a mediawiki user