glibmm: Portable Network I/O Functionality

# Portable Network I/O Functionality

## Classes
class | Gio::InetAddress
| An IPv4/IPv6 address. More...
class | Gio::InetSocketAddress
| Internet SocketAddress. More...
class | Gio::NetworkAddress
| A SocketConnectable for resolving hostnames. More...
class | Gio::NetworkService
| A GSocketConnectable for resolving SRV records. More...
class | Gio::Resolver
| Asynchronous and cancellable DNS resolver. More...
class | Gio::Socket
| Low-level socket object. More...
class | Gio::SocketAddress
| Abstract base class representing endpoints for socket communication. More...
class | Gio::SocketAddressEnumerator
| Enumerator type for objects that contain or generate SocketAddresses. More...
class | Gio::SocketClient
| Helper for connecting to a network service. More...
class | Gio::SocketConnectable
| Interface for potential socket endpoints. More...
class | Gio::SocketConnection
| A socket connection. More...
class | Gio::SocketListener
| Helper for accepting network client connections. More...
class | Gio::SocketService
| Make it easy to implement a network service. More...
class | Gio::SrvTarget
| DNS SRV record target. More...
class | Gio::TcpConnection
| A TCP SocketConnection. More...
class | Gio::ThreadedSocketService
| A threaded GSocketService. More...
class | Gio::UnixConnection
| A Unix domain SocketConnection. More...