trojan 1.4.4

Changelog

• Fix a bug that trojan server crashes on receiving UDP packet with hostname
• Make Travis-CI use Ubuntu Xenial to compile trojan
• Add Wants=network.target to systemd service
• Add build guide for Debian users to docs

SHA224

trojan-1.4.4-macos.zip

60b541ae31acaf117c5d260fdbe274ad294d947779267300b160923e

trojan-1.4.4-win.zip

a8670862ce9e0ff5a05e86096415e9f0e32797a83475d9d94c7d6456