Avoid to rewrite .git files on environment initialization

[cetver]

If environment directory placed on different git repository initialization script trying to rewrite it:

Start initialization ...

  unchanged yii
   generate .git/COMMIT_EDITMSG
  unchanged .git/info/exclude
      exist .git/FETCH_HEAD
            ...overwrite? [Yes|No|All|Quit]

Fix:
rewrite https://github.com/yiisoft/yii2-app-advanced/blob/master/init#L94 to

if ($path === '.git' || $path === '.svn' || $path === '.' || $path === '..') {

[lav45]

And what makes .git in your environments folder ?

[cetver]

Some developers don't have access to production settings. In GIT you can't revoke access from selected directory only for repository. For this environment directory placed in another GIT repository.

[lav45]

in this case it is better to use the

glob(__DIR__ . '/*'); 

in place readdir()

[samdark]

Decided not to change it in app template. It's quite specific case and could be adjusted manually if needed.

[cetver]

Strange decision, "svn" is also quite specific case (not all projects used SVN as VCS), but it skipped.

[samdark]

Oh, I was thinking about something totally diffrent :)

[samdark]

Fix applied. Thanks!