Added support for utf8 path

[agoosev]

Currently, we can't work with non-latin letters in path. For example: http://example.com/тестовый_путь/ or http://example.com/flüg/. I resolve this problem by adding in CHAR_UNRESERVED constant \pL for support utf-8 letters.

[zf2timo]

Looks similar to #155

An Unit Test with UTF-8 Characters was already added in #159.

[agoosev]

@zf2timo, yes, but #155 covers only cases with utf8 domains. In this pull request I covered cases with utf8 path of url.

[zf2timo]

@agoosev you are right.

[weierophinney]

Thanks, @agoosev!