2005-04-22  Mark McLoughlin  <mark@skynet.ie>

	Add the ability to make GDM spawn XDMCP sessions on a local
	X proxy server. Experimental support for disconnect/reconnect
	or "session migration" is also implemented using DMX.
	More details in bug #301602.

	* configure.in: require glib 2.6.0 and check for DMX.

	* config/gdm.conf.in: add xdmpc/EnableProxy, xdmcp/ProxyXServer
	and xdmcp/ProxyReconnect config keys.

	* docs/C/gdm.xml: document new config keys.

	* daemon/gdm.h: add TYPE_XDMCP_PROXY server type, add #defines
	for the new config keys, re-name various xnest related GdmDisplay
	members to be applicable for all proxy servers, add xdmcp_dispnum
	GdmDisplay member, modify the format of GDM_SOP_QUERYLOGIN and
	add GDM_SOP_AUTHFILE and GDM_SOP_MIGRATE.

	* daemon/gdm.c: read the new config keys, change format of what
	GDM_SOP_QUERYLOGIN returns, implement GDM_SOP_AUTHFILE and
	GDM_SOP_MIGRATE.

	* daemon/xdmcp.h: add gdm_xdmcp_migra...