Hotfix for password checking fail

[dev4u]

可能存在iPSK:uPSK格式的密码。 如果要在客户端检测，要先以:做分组，然后对分组后的psk做检测。 Ref: https://github.com/shadowsocks/shadowsocks-android/commit/243cafd41d0712da1f5693067f1f9b0fc6408645#r102304121

[Mygod]

Wow imagining not putting all of this crap in a plugin. 😒

[dev4u]

Wow imagining not putting all of this crap in a plugin. 😒

😄这是病，已安排治疗。希望能控制下次不病发。

[dev4u]

@Mygod 这个应该可以审查了 ヽ(^。^)丿