feat: Allow snapshots to be sent to sendsnapshot.aspx

[cetteup]

This change will allow use of an ASP "compliant" snapshot endpoint which can be proxied to by unlockproxy/playerpath. To make use of this change, server admins only need to modify their config here (change /ASP/bf2statistics.php to /ASP/sendsnapshot.aspx):

asp/src/python/bf2/BF2StatisticsConfig.py

Lines 30 to 35 in df86f71

	# ------------------------------------------------------------------------------
	# ASP Stats Backend Web Server
	# ------------------------------------------------------------------------------
	http_backend_addr = '127.0.0.1'
	http_backend_port = 80
	http_backend_asp = '/ASP/bf2statistics.php'