Bug#411639: add a file to allow .xsessionrc to be sourced at login

[Yves-Alexis Perez <corsac@corsac.net>]

Would it be ok to put this file /etc/X11/Xsession.d so user can have a
.xsessionrc in her homedir?

-- 
Yves-Alexis

#Source user defined xsessionrc (locales and other environment variables)
USERXSESSIONRC=$HOME/.xsessionrc
if [ -r "$USERXSESSIONRC" ]; then
	. "$USERXSESSIONRC"
fi