2.2.4.19 Phase 1 and Phase 2 Auth Suite Kerberos Proxy Server
Keys: Software\Policies\...\Phase1AuthenticationSet\<wszSetId>\<SuiteIndex>
Value: "ProxyServer"
Type: REG_SZ.
Size: Equal to size of the Data field.
Data: A Unicode string.
This value represents the wszProxyServer field of the FW_AUTH_SUITE structure as defined in [MS-FASP] section 2.2.63.