merge r3153, r3154, r3288, r3382: request header processing fixes: *) $host is always in low case: *) move low case convertation from ngx_http_find_virtual_server() to ngx_http_validate_host() *) add in ngx_http_validate_host() capability to copy host name in the pool allocated memory *) fix segfault if there is single large_client_header_buffers and a request line fills it completely *) default large_client_header_buffers' buffer size should be 8K as compatible with Apache's one

geo2nginx.pl 		by Andrei Nigmatulin

	The perl script to convert CSV geoip database ( free download
	at http://www.maxmind.com/app/geoip_country ) to format, suitable
	for use by the ngx_http_geo_module.


unicode2nginx		by Maxim Dounin

	The perl script to convert unicode mappings ( available
	at http://www.unicode.org/Public/MAPPINGS/ ) to the nginx
	configuration file format.
	Two generated full maps for windows-1251 and koi8-r.