Forward form https://github.com/shadowsocks/shadowsocks-libev/issues/1945

What version of shadowsocks-libev are you using?
Latest

What operating system are you using?
Linux

What did you do?
I've send the following request to [2001:470:1:18::119]:
GET /ip/?callback=?&testdomain=test-ipv6.com&testname=test_ipv6
HTTP/1.1\r\nHost: [2001:470:1:18::119]\r\n\r\n
with atyp=4 (IPv6)

What did you expect to see?
INFO connect to [2001:470:1:18::119]:80

What did you see instead?
Pure IPv6 address truncated:
INFO connect to [2001:470:1:18::80

What is your config in detail (with all sensitive info masked)?
No matter. Problem in SNI sniffing (parse_http_header() func in http.c).
IPv6 address without port has been truncated by the last colon.