HGKeeper

da263b5cb33c

Make all of the license headers consistent.

Testing Done:
Compile only.

Reviewed at https://reviews.imfreedom.org/r/238/

# h1

## h2

### h3

#### h4

##### h5

###### h6

plain *emphasis* _emphasis_ ~~**strong**~~ __strong__ `code` plain

[Test link](https://pidgin.im)

`code`

```

code?

```