Hallo,

Euch ist bewußt daß Links wie
http://test.domain/~user/
ebenfalls invalide sind

nicht dass wir es wüssten:
RFC 2396
2.3. Unreserved Characters

Data characters that are allowed in a URI but do not have a reserved
   purpose are called unreserved.  These include upper and lower case
   letters, decimal digits, and a limited set of punctuation marks and
   symbols.

unreserved  = alphanum | mark

mark        = "-" | "_" | "." | "!" | "~" | "*" | "'" | "(" | ")"

For example, "%7e" is sometimes used instead of "~" in an http URL
   path, but the two are equivalent for an http URL.

Grüße
Thomas