Host name check depends on the protocole used

[jjoannes]

While using an invalid (according to the RFC RFC 1123) host name (which contains a "_") I didn't get the same behavior when using WS or TCP. With WS I get:

Caused by: java.net.URISyntaxException: Illegal character in hostname at index ...

While with TCP there is no error. IMHO the behavior should be the same whatever the protocol...

[Christian Schudt]

Convert hostname to ASCII before applying it

This also ensures a unified behavior (e.g. exception), no matter which protocol.

Fixes issue #143

→ <<cset 13e064f4662b>>

[Christian Schudt]

Fix version 0.8.1