Resync zephyr-post-receive with upstream This incorporates the changes in snippets from 7f3e83eb49926fd6bf2d60ee2a9642640e5b8b0b ("zephyr-post-receive: Detect renames." by Anders) to 0a6422ec6a30429215c4a93dd5a40799712c09b0 ("zephyr-post-receive: fix quoting and tabs" by me).