Release 6.20.0: Updated Apache configuration

[changerequest]

The example configuration to configure Apache for Open-Xchange is updated with the newest optimizations achieving the best performance in combination with Open-Xchange. The directory /usr/share/doc/open-xchange/examples/ contains new versions for proxy_ajp.conf and deflate.conf. These look like this:

# AJP configuration for OX hosts

<Location /axis2>
# restrict access to the soap provisioning API
Order Deny,Allow
Deny from all
Allow from 127.0.0.1
# you might add more ip addresses / networks here
# Allow from 192.168 10 172.16
</Location>

<IfModule mod_proxy_ajp.c>
ProxyRequests Off
ProxyStatus On
<Proxy balancer://oxcluster>
Order deny,allow
Allow from all
BalancerMember ajp://oxhost1:8009 smax=0 ttl=60 retry=60 loadfactor=50 route=OX1
# Enable and maybe add additional hosts running OX here
# BalancerMember ajp://oxhost2:8009 smax=0 ttl=60 retry=60 loadfactor=50 route=OX2
ProxySet stickysession=JSESSIONID timeout=70
</Proxy>
<Proxy /ajax>
ProxyPass balancer://oxcluster/ajax
</Proxy>
<Proxy /axis2>
ProxyPass balancer://oxcluster/axis2
</Proxy>
<Proxy /servlet>
ProxyPass balancer://oxcluster/servlet
</Proxy>
<Proxy /infostore>
ProxyPass balancer://oxcluster/infostore
</Proxy>
<Proxy /publications>
ProxyPass balancer://oxcluster/publications
</Proxy>
<Proxy /Microsoft-Server-ActiveSync>
ProxyPass balancer://oxcluster/Microsoft-Server-ActiveSync
</Proxy>
<Proxy /usm-json>
ProxyPass balancer://oxcluster/usm-json
</Proxy>
</IfModule>


# deflate configuration

<IfModule mod_deflate.c>

DeflateFilterNote ratio
LogFormat '%r %b (%{ratio}n) %{User-agent}i' deflate
CustomLog /var/log/apache2/deflate.log deflate

SetOutputFilter DEFLATE

# Netscape 4.x has some problems...
BrowserMatch ^Mozilla/4 gzip-only-text/html

# Netscape 4.06-4.08 have some more problems
BrowserMatch ^Mozilla/4\.0[678] no-gzip

# MSIE masquerades as Netscape, but it is fine
BrowserMatch \bMSI[E] !no-gzip !gzip-only-text/html

# Don't compress images
SetEnvIfNoCase Request_URI \.(?:gif|jpe?g|png)$ no-gzip dont-vary

# Make sure proxies don't deliver the wrong content
Header append Vary User-Agent env=!dont-vary

</IfModule>