add link to obfs-local usage

Author: icymind

src/renderer/components/Manage/ProfileEditor/ProxiesForm/SsForm.vue

@@ -43,7 +43,7 @@
  <div class="field">
  <div class="ui checkbox field">
  <input type="checkbox" value="obfs" v-model="enableObfs">
- <label>Obfuscating</label>
+ <label>Obfuscating <a href="https://github.com/shadowsocks/simple-obfs#plugin-mode-with-shadowsocks"><i class="icon help circle"></i></a></label>
  </div>
  <div class="ui fluid input">
  <input type="text" v-model="shadowsocks.plugin_opts" v-bind:disabled="!enableObfs">