Jeremy Felt 6df1337645 Exclude individual site directories when calculating space used for the main site.
* Add an `$exclude` parameter to `recurse_dirsize()`.
* Use this parameter in `get_dirsize()` to exclude `/sites` when on the main site.
* Add tests for main site and switched site.

Props @earnjam, @jeremyfelt.
Fixes #30202.


git-svn-id: https://develop.svn.wordpress.org/trunk@33184 602fd350-edb4-49c9-b593-d223f7449a82
2015-07-13 00:06:39 +00:00
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