fix autoconf for nfsd plugin

The nfsd plugin tries to read a line containing 'proc3', but it's gone
on some recent systems that don't use nfsv3 any more. Check for the
presence of this line in autoconf, and report 'no' if it's not there.
Add numa plugin
replace bash with @@GOODSH@@ for NUMA plugin
add more documentation to numa plugin
add more documentation to numa plugin (hugepages note)
Move wiki page to Munin-Guide
http://munin-monitoring.org/wiki/protocol-dirty-config
Merge pull request #250 from aowi/devel

fix autoconf for nfsd plugin
protocol.rst moved to architecture chapter
Merge branch 'guide' into devel

* guide:
  guide: fix url for Wiki about MuninExchange
  guide: Adding some precision on the various docs
Started new chapter "Advanced"
and move protcol beneath "Architecture"
added some references and links also
Reserve Chapter "Advanced" to really advanced topics
Moved "How to write plugins" back to plugins chapter
Merge branch 'guide' into devel

* guide:
  guide: formatting the preface
  guide: preface clarifications

Conflicts:
	doc/preface/index.rst
Added api-index
Added more links to wiki pages
Pages should be moved to the Guide or deleted in the wiki
added syntax page, more wiki links
Created chapter Others
and moved the draft docs thereto
Link from Preface to new chapter Others
Recommendations for Plugin-Installation
and a link to common master <-> node protocol
Tutorial on wildcard plugins moved from wiki to Guide
plus point to Munin Gallery
Show all components docs under "Architecture"