Normalises a stream URI so one file has one key (public://a//b.png is public://a/b.png). Rejects .. rather than resolving it, so a URI cannot address another scheme's bytes.
public://a//b.png
public://a/b.png
..
Normalises a stream URI so one file has one key (
public://a//b.pngispublic://a/b.png). Rejects..rather than resolving it, so a URI cannot address another scheme's bytes.