Fix string issue in http
Fix string issue in http

When the request line is not made of value character, the conversion to
string will fail when trying to display it. To avoid the problem, we
should convert any invalid character before reporting the error.

Wingless-Archangel/haka,lcheylus/haka,haka-security/haka,LubyRuffy/haka,nabilbendafi/haka,nabilbendafi/haka,haka-security/haka,lcheylus/haka,nabilbendafi/haka,Wingless-Archangel/haka,haka-security/haka,LubyRuffy/haka,lcheylus/haka