... and related services:

com.sun.star.system.SOffice52ProxySettings
com.sun.star.system.ProxySettings
com.sun.star.system.SystemProxySettings

The implementation for these has apparently been removed in
OpenOffice.org 2.0 or thereabouts.

EXISTENCE: published key
"/UCR/com/sun/star/system/SOffice52ProxySettings" exists only in
registry 1
EXISTENCE: published key "/UCR/com/sun/star/system/ProxySettings" exists
only in registry 1
EXISTENCE: published key "/UCR/com/sun/star/system/XProxySettings"
exists only in registry 1
EXISTENCE: published key "/UCR/com/sun/star/system/SystemProxySettings"
exists only in registry 1

Change-Id: If00c332edf08619fcad12ed07d0d8a13a714045e