Bugfixes:
----------------------------
+ Fixed RADIUS authentication fails on 1.6.0 (#3986);
+ Fixed cannot add NAT issue (#3993);
Security Fixes:
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+ Multiple XSS injections (#4145,#4146,#4147,#4148,#4149.#4150,#4151);
+ HTML DOM XSS injection via filenames when uploading (#4160);
+ Disable /app/install/ helper scripts via config.php $disable_installer;