fixup! 134d9934 fix PassengerAppRoot path
Group httpd  assets directives together
fixup! d7adeac
fixup! e8f30da
fixup! 2a0c4d7 add another passenger tuning guide
Decrease default PassengerMaxPoolSize

Passenger's default MaxPoolSize is 6. At the time of writing
normal* instances of Alaveteli seem to take 150-200MB per
process, so we've set this conservatively at 3.

* ‘Normal’ is basically any vHost other than WDTK, which is
running at around 500MB per process
Group passenger performance directives together
Move RewriteEngine directive to top of vHost config

Easier to see what mods are enabled if they’re not buried in
the middle of configuration
Add additional note about SuExecUserGroup
Run passenger as alaveteli user rather than foi

The manual install guide assumes alaveteli as the file owner and
foi as the database user, so do that here.