Always converge the nginx site.

We might have changed the recipes, or another cookbook (e.g. phpmyadmin) might have messed things up.
Moved log_format directives to the right place.
Added frequently-required redirect for Fooman Speedster.

It does no harm being there if Speedster isn't used.
Fixup nginx converge.
Fixup fooman.
Always converge the nginx site.

We might have changed the recipes, or another cookbook (e.g. phpmyadmin) might have messed things up.
Moved log_format directives to the right place.
Added frequently-required redirect for Fooman Speedster.

It does no harm being there if Speedster isn't used.
Merge branch 'fooman'
Moved simplified Fooman rules to bottom of nginx site config.
Named php-fpm service to fix Ubuntu failure.
Added variables required for memcached.conf.erb in memcached cookbook.
Always test content of SSL certs - we might be changing them; fixed bug with defined? test of :ca config.