Inlining reader::request::value() to avoid redefinition

[tarc]

If boost::http::buffered_socket was being used as member of a class implemented in a .cpp, for instance, the linker complained about redefinition in the file including the header of the class and in the object resulting of compilation of the class itself.

[vinipsmaker]

Gonna accept the PR, don't worry. Could you paste the build failure messages and report the used compiler, btw?

[tarc]

Sure.

Microsoft Visual Studio Community 2015 (Version 14.0.25123.00 Update 2).

2>HTTP.obj : error LNK2005: "public: class boost::basic_string_ref<char,struct std::char_traits<char> > __cdecl boost::http::reader::request::value<struct boost::http::token::method>(void)const " (??$value@Umethod@token@http@boost@@@request@reader@http@boost@@QEBA?AV?$basic_string_ref@DU?$char_traits@D@std@@@3@XZ) already defined in App.obj
2>HTTP.obj : error LNK2005: "public: class boost::basic_string_ref<char,struct std::char_traits<char> > __cdecl boost::http::reader::request::value<struct boost::http::token::request_target>(void)const " (??$value@Urequest_target@token@http@boost@@@request@reader@http@boost@@QEBA?AV?$basic_string_ref@DU?$char_traits@D@std@@@3@XZ) already defined in App.obj
2>HTTP.obj : error LNK2005: "public: int __cdecl boost::http::reader::request::value<struct boost::http::token::version>(void)const " (??$value@Uversion@token@http@boost@@@request@reader@http@boost@@QEBAHXZ) already defined in App.obj
2>HTTP.obj : error LNK2005: "public: class boost::basic_string_ref<char,struct std::char_traits<char> > __cdecl boost::http::reader::request::value<struct boost::http::token::field_name>(void)const " (??$value@Ufield_name@token@http@boost@@@request@reader@http@boost@@QEBA?AV?$basic_string_ref@DU?$char_traits@D@std@@@3@XZ) already defined in App.obj
2>HTTP.obj : error LNK2005: "public: class boost::basic_string_ref<char,struct std::char_traits<char> > __cdecl boost::http::reader::request::value<struct boost::http::token::field_value>(void)const " (??$value@Ufield_value@token@http@boost@@@request@reader@http@boost@@QEBA?AV?$basic_string_ref@DU?$char_traits@D@std@@@3@XZ) already defined in App.obj
2>HTTP.obj : error LNK2005: "public: class boost::asio::const_buffer __cdecl boost::http::reader::request::value<struct boost::http::token::body_chunk>(void)const " (??$value@Ubody_chunk@token@http@boost@@@request@reader@http@boost@@QEBA?AVconst_buffer@asio@3@XZ) already defined in App.obj