[XSP] Clean up XSPApplicationHost, use modern features
[XSP] Clean up XSPApplicationHost, use modern features

stormleoxia/xsp,murador/xsp,stormleoxia/xsp,murador/xsp,murador/xsp,arthot/xsp,stormleoxia/xsp,arthot/xsp,stormleoxia/xsp,arthot/xsp,arthot/xsp,murador/xsp