Change logs:
* Support http proxy to verify license by setting enviornment `http_proxy`
* Change group license default flag to `i` which ignores computer name
Fix issues:
* `NameError: name '__assert_armored__' is not defined` when there is docstring in the function and the script is obfuscated by both `--enable-bcc` and `--mix-str`
* When using `--enable-rft`, configuration items `bcc:excludes`, `bcc:includes`, `assert.call:includes` and `assert.call:excludes` do not work