Add support for Semantic URLs

[lightos]

Add support for URLs that include the path traversal in a semantic URL (https://en.wikipedia.org/wiki/Semantic_URL).

For example, instead of:
http://www.example.com/file.php?x=/etc/passwd

A semantic URL may include the path traversal in the following form:
http://www.example.com/file/x/etc/passwd

[sitz]

+1