*: Support tls for external #492

[zhl003]

What type of PR is this?

Which issue(s) this PR fixes?

Fixes #492

What this PR does?

Summary:
Support tls for external

Special notes for your reviewer?

[runkecheng]

Before the first word of all comments, there must be a space. If the first word is not a variable name or function name, the first letter should be capitalized.

var test string

//test    ×
// test     √

// if test xxx    ×
// If test xxx    √

[runkecheng]

Before the first word of all comments, there must be a space. If the first word is not a variable name or function name, the first letter should be capitalized.

var test string

//test    ×
// test     √

// if test xxx    ×
// If test xxx    √